Case Material: Stainless Steel
Case Diameter: 42mm (approx)
Case Thickness: 13mm (approx)
Caseback: Solid Caseback
Glass: Scratch resistant Hardlex Crystal
Case Finishing: Polished Stainless Steel With Brushed Sides
Dial:Black Dial With Chrome Markers
Illuminous: Chrome Lumibrite Hands & Markers
Day & Date Display at 3 O'clock
Band: Rubber strap with buckle closure
Band Width: 22mm (approx.)
Wrist Size: Up to 210mm (approx.)
Movement: Seiko 21 Jewels Automatic Cal. 7S26
This precise 21-jewel Japanese automactic movement keeps this watch functioning by the movement of the wearer’s arm. No battery is needed.
Warranty : seller's 1 year (upon our sale record and so no warranty card is provided)
After sale service
Please contact us if you need any helps. Thank you.
Brief History of Seiko 5
SEIKO 5 - the meaning of the "5" A great marketer had the idea in the 70ies: to be a SEIKO 5, the watch has to have the following 5 (five) attributes (thus the name SEIKO 5):
1. Automatic winding
2. Day/date display in a single window at 3 O’Clock
3. 3ATM / 30 Metres / 100 Feet Water resistance (see more information at bottom)
4. Recessed crown at the 4 o’clock position
5. Durable case and bracelet
Please note that some SEIKO 5's are in fact SEIKO 4's, if the "Day" function is omitted, then the Caliber 7S25 is used. The only difference to the normally found 7S26 is the omission of the day wheel. Also re-issues of SEIKO 5 Sports often use the 7S36 caliber. Again the 7S36 is similar to the most popular 7S26, yet it features 23 Jewels as opposed to the 21 Jewels in the 7S26. Please note that all these movements beat at a rate of 21'600 bph (beats per hour) or 6 bps (beats per second). As a comparison, an ETA 2824-2 beats at 28'800 bph or 8 bps. A Miyota 82xx beats at 21'600 bph. Why do I mention these three movements? Because they are found in probably 80% of all inexpensive automatic wrist watches. A market share that is huge, yet challenged these days (2006) by an increasing share of inexpensive China Made automatic movements An automatic watch (also called a self-winding watch) is a mechanical watch, typically with a balance wheel escapement, whose mainspring is wound by the motion of the wearer's arm, instead of having to be wound manually every day. Whereas a quartz watch is powered by electricity, a mechanical watch is powered by a mainspring which must be rewound for the watch to keep time.
Watches are often classified by watch manufacturers by their degree of water resistance which, due to the absence of official classification standards, roughly translates to the following (1 metre ≈ 3.29 feet).
| Water resistance rating | Suitability | Remarks |
|---|---|---|
| Water Resistant 3 atm or 30 m | Suitable for everyday use. Splash/rain resistant. Not suitable for showering, bathing, swimming, snorkelling, water related work and fishing. | Not suitable for diving. |
| Water Resistant 5 atm or 50 m | Suitable for swimming, white water rafting, non-snorkeling water related work, and fishing. | Not suitable for diving. |
| Water Resistant 10 atm or 100 m | Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. | Not suitable for diving. |
| Water Resistant 20 atm or 200 m | Suitable for professional marine activity, serious surface water sports and skin diving. | Suitable for skin diving. |
| Diver's 100 m | Minimum ISO standard (ISO 6425) for scuba diving at depths not suitable for saturation diving. | Diver's 100 m and 150 m watches are generally old(er) watches. |
| Diver's 200 m or 300 m | Suitable for scuba diving at depths not suitable for saturation diving. | Typical ratings for contemporary diver's watches. |
| Diver's 300+ m for mixed-gas diving | Suitable for saturation diving (helium enriched environment). | Watches designed for mixed-gas diving will have the DIVER’S WATCH xxx M FOR MIXED-GAS DIVING additional marking to point this out. |
Manufacturers water resistance classifications are interpretations and are not part of any ISO standard definition.