Seiko Cal. 3851 - 612

This Spring Drive model from 1968 features a 45mm Stainless Steel case. Powered by the 3851 caliber with 17j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-66710b70b927]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1968

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