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COLLECTIBLE & USEABLE!!!

A.W. FABER CASTELL

ENGINEERS LOG LOG

SLIDE RULE No. 1/92

Full-Size

Date Code 53 (1953)

“Made In Germany”

No Reserve. Low Minimum. Priced To Sell.

Using the marked date code (53), this 1953 German vintage A. W. FABER CASTELL Engineers Log Log Closed Frame Beech Laminate Slide Rule No. 1/92 with its split stock joined with steel springs, moveable slide and plexiglass plate displaying three vertical lines (cursor with tension adjustment) is in great condition. The slide rule It features two-color (red/blue) scale markings, some “railroad-type tracks” and over-range scale extensions, wood composite with laminated celluloid top, 11 without lettering scales Front:(LL2, A [B, CI, C] D,LL3, Side: K, Back: S, L, T ], Labels Left [sin, lg, tg], Labels Right: [cos, lg, ctg ] plus a 10-inch measurement rule. There are left and right viewing cutouts with index marks, in back for reverse of slide. Note the unusual K scale (Cubed) on the slide rule edge. On the backside of this slide rule comes with reference tables containing formulae for six different disciplines listed below:

- THE PHYSICAL PROPERTIES OF METALS

- MATHEMATICS

- MECHANICAL

- ELECTRICAL

- CIVIL ENGINEERING

- PHYSICS

In addition, this12" full-size wood body comes complete with a sturdy two-part green reinforced cardboard holder/case.

For those slide rule enthusiasts, this A. W. FABER CASTELL 1/92 – Engineers Log Log Closed Frame Beech Laminate Slide Rule with its “53” year of manufacture set on the backside of this tool, features unique scale extension along with different decimal tenths segments between 1 and 2 on C, CI, and D scales. In addition, there are different gauge marks set onto different scales including:

π (3.14) on the A, B, CI, C and D scales

M (1/π=0.318) on the A and B scale

C (1.13) on the C scale

C₁ (3.57) on the C scale

ƍ" (2063) on the C and D scales

ƍ’ (3438) on the C and D scales

There are no instructions with this A. W. FABER CASTELL 1/92 – Engineers Log Log Closed Frame Beech Laminate Slide Rule, however, instructions can be located on several Internet web sites as noted in the REFERENCES & ACKNOWLEDGEMENTS to include: http://www.andtheugly.com/slides/srman/srman.html#fcp1

NOTE ON CONDITION

eBay bidders who are interested in this A. W. FABER CASTELL Engineers Log Log Closed Frame Beech Laminate Slide Rule No. should be aware that the slide rule as examined, has been carefully used by its previous owner(s). There are no obtrusive or detractive contact marks, ink/pencil marks, scrapes, or dings on the rule and reversible slide. Also, there are no past ownership marks of any kind.

The mentioned cosmetics flaw would be expected with a normal wear and tear coming with age and occasional use. However, this shortcoming is recognizable and expected to be viewed by some to be a slight negative aspect to the overall package value of this 1953 vintage slide rule.

Please note that the overall existing fine state, and operable condition were considered in making appropriate value adjustments in setting the minimum bid amount for this auction.

eBay bidders are encouraged to fully examine all pictures and review this input before making any decision to participate in this auction.

In absolute great condition, the scales represented on this A. W. FABER CASTELL 1/92 – Engineers Log Log Closed Frame Beech Laminate Slide Rule are labeled. The front body and slide scales as displayed and mentioned in the table are: Scale, LL₂, A, {B, CI C}, D, LL₃ The K scale is on the front bottom side. The back of the slide provides the SIN/COS, Log, and TANGENT/COTANGENT scales. The scales are labeled on this slide rule, they are the following using the location abbreviations (Body/Slide) (Front/Back) Bottom Side in the table below:

B/S F/B	Scales	Value	Description
BF	INCHES	10 Inches	On Front Top Angled Lip Of Body Front; Imperial/US Measurements In 1/32^ths, 1/16ths, 1/8ths, 1/4ths, ½, And Whole Inch Increments Up To 10 Inches.
BF	LL₂	e^0.1X	Log-log scale. Exponential power scale used to raise a power that is greater than “e” (2.71828) with a range of 1.1 to 3.2.
BF	A	X² Squared	Scale Of Squares On The Body. Typically Found On The Top Stator. Used With The D Scale On The Bottom Stator. The Square Of A Number On The D Scale Can Be Read On The A Scale. In Like Manner, Square Roots Of Numbers On The A Scale Can Be Read On The D Scale.
SF	B	X² Squared	Scale Of Square. Used With The C Scale To Read Squares And Square Roots Like The A And D Scales. Also Used To Multiply With The A Scale.
SF	CI	1/X	Reciprocal Scale On The Slide. Displays The Reciprocal Of C Scale, Essentially The C Scale Running Backward. Useful In Chain Calculations Without Having To Reset The Slide.
SF	C	X	Fundamental Scale On The Slide. Most Calculations With Other Scales Are Done In Conjunction With The D Scales.
BF	D	X	Fundamental Scale On The Body. Most Calculations With Other Scales Are Done In Conjunction With The C Scales.
BF	LL₃	e^X	Log-log scale. Exponential power scale used to raise a power that is greater than “e” (2.71828) with a range of 2.5 to 10⁵ and also for powers with whole and factional exponents also for formation of hyperbolic functions.
BF	L	Log X	Mantissa Scale. Logarithms to base 10. Linear Scale Used To Determine The Log Values (Mantissa Only) Of Other Scales. Commonly Used In Conjunction With The C & D Scales To Determine The Mantissa Of Logarithms.
BF	K	X³ Cubed	Scale Of Cubes On The Body. On The Low Straight Edge. Used With The D Scale On The Bottom Stator. The Cube Of A Number On The D Scale, Can Be Read On The K Scale.
SB	S	SIN 0.01X (COS)	Scale Of Sines And Cosines Used to determine sines or cosines of angles, typically within range of 5.7 and 90 degrees (although there is some variation in lower limit). Presented with increasing numbers for Sines and decreasing numbers for Cosines on the same scale. For example, to find the SINE of 32 degrees, set the degree number (eg. 32°) on the SIN/COS Scale using the index line on the back indent side of the slide, then read the result on the B Scale under the A1 on the A Scale. (eg. Sin 32° = .53).
SB	L	lg X	Mantissa Scale. Logarithms to base 10. This slide rule uses the D Scale in conjunction with the C Scale Used To Determine The Log Values (Mantissa Only) Found On The LG Scale. For example, the log of 1.35 would be found by placing the C Scale (Index) over the number 1.35 on the D Scale, the log number of 0.1303 would be found under index line on the LG Scale. (eg. Lg 1.35 = 0.1303).
SB	T	tg 0.1X	First Scale of Tangents from 5º 43’ to 45º. Trigonometric scales in decimal subgraduation for calculation of the angular functions and triangles. ). Presented with increasing numbers for Tangent and decreasing numbers for Cotangent on the same scale. For example to find the TANGENT of 7 degrees 40 minutes, set the degree number (eg. 7° 40’) on the TG/CTG Scale using the index line on the back indent side of the slide, then read the result on the D Scale under the A1 on the A Scale. (eg. Tangent 7°40’ = .0.1346).

Background. FABER-CASTELL slide rules were made primarily in Germany (plus Switzerland and Austria) starting in 1882, and are known for their design and elegance, and clearly was one of the prominent European slide rule makers. Faber-Castell sold a wide range of models, with many of their early offerings made of Swiss pearwood or boxwood with celluloid facings. Later in 1952, rules were made out of Geroplast and featured some of the most useful and advanced features ever seen on slide rules. Always the innovator, Faber was often copied but rarely duplicated by other manufacturers and remain among the most sought after by collectors. Additional information about A.W. Faber-Castell slide rules can be reviewed at different Internet web sites including: https://www.sphere.bc.ca, http://tinas-sliderules.me.uk/Slide%20Rules/Faber.html, and https://sliderulemuseum.com

Using the valuation and information guides* similar to the grading of fine tools, this 1953 vintage A. W. FABER CASTELL Engineers Log Log Closed Frame Beech Laminate Slide Rule No. 1/92 might be graded in a FINE⁺ rating in accordance with the criteria:

FINE: Slide Rule is completely useable; wood/plastic/metal is 90-100% and may have signs of slight wear and contact marks; material of parts 80% original or old finish, smooth surface and edges slightly rounded; no breakage or repair; reveal; maker’s marks and model number which are clear and easily legible.

NOTE: Grading is an art and not an exact science thereby creating the need for sound judgment. To address the wide scope of possibility, most grading guides are purposely vague and somewhat subjective in nature. Grading combines personal opinion, subject matter research, past experience, and knowledge to allow each individual a distinct perspective in assessing reasonable or acceptable condition. Value determination comes with the rarity, customization, existing item condition as derived from review of available pictures, questions to the seller, and study of pertinent reference materials. Multiple pictures taken at different angles and available lighting may offer the only possible visual overview of specific features along with the revelation of both the highlights and failings to support a sound decision whether to participate in this online auction.

* REFERENCES & ACKNOWLEDGEMENTS: SLIDE RULES, Their History, Models, and Makers, by Peter M. Hopp., The Slide Rule, by Lee H. Johnson, Slide Rules: A Journey through Three Centuries, by Dieter von Jezierski, Beginner's Guide Collecting Slide Rules, presented by The Oughtred Society and the United Kingdom Slide Rule Circle and various Internet websites to include: https://www.collectorsweekly.com/office/slide-rule, https://en.wikipedia.org/wiki/Slide_rule , https://sliderulemuseum.com/British.htm, www.Rechenschieber.org. http://www.countbelmiro.com/slides/faber/faber.html http://www.mathsinstruments.me.uk/page14.html, http://www.andtheugly.com/slides/srman/srman.html#fcp1 (Instruction Manuals)

Most of the dimensions/features/details/markings of this vintage mathematical tool are mentioned or shown in the pictures provided. The total shipping weight of this A. W. FABER CASTELL 1/92 – Engineers Log Log Closed Frame Beech Laminate Slide Rule, together with protective packing materials will be approximately 9 ounces. The United States Postal System (USPS) postage rate guidelines regarding the size, weight, dimensions, location of recipient and value; suggest that this parcel to be shipped to the eBay registered mailing address of the winning bidder using USPS Ground Advantage^TM Service Postage.

Please note that an invoice showing the total payment breakdown for the (1) winning auction bid, and (2) State Tax, if applicable, will be sent after the auction.

For the eBay Auction bidding winner located outside the United States (US), the automated payment software will generate a United States CUSTOMS DECLARATION FORM (CN22) containing the eBay registered mailing address that will be used as the shipping label placed onto the envelope/packet/package.

Terms And Conditions

1.This auction item is being auctioned "as is" with the East Coast Bits (ECB) description, condition, suggested evaluation/opinion along with the pictures as shown. Information presented in the listing description comes from combining ECB knowledge and expertise, consignor input, references, conferences with subject matter experts, and in-house research using available written material, and unrestricted accessible graphic and text information made available through the Internet. Often available written and online references are mentioned to provide the eBay bidder an opportunity, as desired, to review more information about the auction item. To comply with eBay policy concerning the prevention of possible malicious intent, only the display of secure hypertext transfer protocol (HTTPS) links will be placed into the listing.

2. ECB attempts to provide multiple photographs using different angles and directional lighting together with adequate descriptive text to assist the eBay bidder in making an informative decision before involvement. While this effort to describe all features/aspects is done in due diligence, it is rare but always possible that some flaw or fault might be missed in the initial assessment and description of this auction item. Note that some pictures may be numbered or identified to bring attention to some feature/detail or functional aspect of the auction item. Pictures of objects taken through plastic or glass can be difficult with reflected rays of light that may detract from the true coloring or cause the surface of an object to reflect the light source(s) or display aspects of the plastic/glass surface. ECB strongly encourages eBay bidders to review all the pictures and the auction item description to help create a satisfactory auction transaction. Questions about a description and/or specific picture(s) are always welcome.

3. For a used auction item, wear and tear aspects that are described in the text and are displayed in the attached photos were the primary factors used by ECB to classify this item condition as pre-owned or used. The overall existing condition was then fully considered by ECB in making appropriate value adjustments in setting the minimum bid for this auction.

4. Satisfaction guaranteed. Full refund privilege minus postage and insurance costs are possible if this auction item is returned within 30 days of receipt using the same manner of delivery, postage, and insurance as applicable. To help expedite this auction item return process, an explanatory email message to ECB for the requested return would be appreciated. This auction item along with any related original box/packaging will be expected to be in the same condition as sent.

5. To help in making an informed decision about involvement, potential eBay bidders are encouraged to ask any questions about the description, references, pictures, postage, shipping arrangements, prior to bidding. Note that while ECB monitors all of its eBay listings to know whether a question has been received about an auction item in order to provide a full answer to all questions if possible, ECB may not be able to respond to all questions that are received just prior to the auction closing.

6. eBay bidders are kindly encouraged not to bid if there is any cause for doubt, answers to questions have not been received or do not answer the question raised, or if there is a bidder refusal to accept any of the terms and conditions that are presented herein. In addition, eBay bidders are requested not to bid if there are not any financial means to pay for this auction item, postage, other postal services, and any associated insurance. As may become necessary, non-payment issues will be addressed using the established eBay Problem Resolution process.

7. The shipment of this auction item to any location outside the United States will require the preparation of a US Customs Declaration label on the envelope/packet/package. With the use of online postage labeling, the eBay/PayPal program software will display the listing information on the label including the description of the auction item, weight, and the value as indicated by the winning bid amount. ECB is committed to abide by all stipulated U.S. International Regulations For Mailing. Any/all requests by the winning eBay bidder for any deviation from these published regulations and/or restrictions will be denied.

8. A payment using PayPal service for the total auction transaction costs is desired. Winning eBay bidders should contact ECB prior to the auction closing to allow any consideration for acceptance of any other form of payment. Failure to make this contact will be the winning eBay bidder confirmation of acceptance to use PayPal for payment. ECB is controlled and will abide by the operational and financial aspects (as the Seller) as established by eBay. Per eBay guidance, the winning eBay bidder will be required to directly interact with eBay on questions regard any of the financial aspects (as the Buyer) of this transaction.

9. The winning eBay bidder is requested to review the accuracy of the current mailing address as registered in PayPal. Unless a different mailing address is identified and specified by the winning eBay bidder via an email message to ECB prior to shipment, the mailing address registered in PayPal will be used. ECB may send an email message through eBay for an English translation of a registered foreign address to help assure the correct processing of mail distribution and delivery.

10. ECB will make every attempt to ship this auction item on the next business day after PayPal payment. If this shipment cannot be accomplished within this target 1-day schedule for whatever reason, ECB will notify the winning eBay bidder of the delay and provide some input as known about on the expected date of shipment. Note that delays are infrequent but can occasionally occur in acquiring appropriate and sufficient packing materials to provide suitable and adequate protection for the auction item during transportation and delivery.

11. Payment through PayPal must fully clear before an auction item is sent in a secure manner using protective materials to help safeguard against if from any accidental damage during transportation and delivery.

12. ECB will attempt to investigate and provide full and informative email communications about the shipping and delivery status of this transaction after the auction closing if not indicated through the automatic progress updates posted onto the eBay auction transaction. ECB cannot track the delivery progress status outside the US.

13. ECB may send a message through eBay to determine the reason for the lack of payment or communications with the eBay bidder within seven (7) days after the end of the auction. In addition, ECB may take action to coordinate with eBay to assist in the resolution of a non-payment matter.

14. ECB will strive to make this bidding/buying experience to be both pleasant and acceptable in order to earn the satisfaction and the possible eBay bidder positive input to the ECB eBay profile. ECB will be very pleased to provide positive input to the winning eBay bidder profile as well.