Seiko Cal. 3815 - 688

This Spring Drive model from 1972 features a 39mm Stainless Steel case. Powered by the 3815 caliber with 22j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-accc695555d4]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

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