Seiko Cal. 6637 - 839

This Spring Drive model from 1973 features a 46mm Stainless Steel case. Powered by the 6637 caliber with 25j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-d3de12f461d7]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1973

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