DESCRIPTION

Now you can add my used Albert Nestler 23R slide rule to your collection.The Albert Nestler 23R slide rule was fabricated mahogany

and covered by white celluloid,screwed to the wood(to avoid shrinkage) until 1940.The Albert Nestler 23R slide rule have some 

variation over time,but this offer has been in National Air and Space Museum in WashingtonD.C.,according to their record ,they are

the slide rules of the Rocket Pioneers such as Wernher Von Braun,Russian Sergei Korolev,Albert Nestler 23R slide rule is also the

favorite Albert Einstein.

My used Albert Nestler 23R slide rule is in good working condition,the only imperfection is the box as shown in the pictures and very

light discoloration due to age and usage.Those are just cosmetic and does not affect the performance of the slide rule.A multi-lined

cursor is being provided.as shown in the pictures.Please visit the website of National Museum of American History to see the slide

rule used by Albert Einstein.

As a bonus,a reprint copy of an article from Scientific American Magazine  May 2006 issue.It was mention by one of the slide rule

historian Cliff Stoll on this article that Albert Nestler is also the slide rule of Von Braun and Sergei Korolev,same with Albert Einstein.

This article mention also the basic operation of a slide rule.

From pet and smoke free home.

Zoom all the pictures for your own evaluation,before deciding to buy.What you see and what is being described is the one you are

going to received,If you need more information just ask.

Since this listing is very hard to find,only buyers with 3 or more positive and no negative feedback in the last 3 months  can buy or

else your offer will be rejected.

No shipping to:Puerto Rico,Hawaii and Alaska.Buyers other than American and Canadian are also welcome,but you have to contact 

us first ,so we can ask our Canada Post if we have delivery to your country,Please provide us with your postal code and contact

number.

In case you have concern about your purchase,please contact us first before leaving us a neutral or negative feedback.Customer

satisfaction is our number one priority.You can always check all our feedbacks.

Thank you for checking my other listings.Yes we can do combine shipping to save you on shipping cost.