Seiko Cal. 5637 - 838

The 5637-838 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5637 caliber with 30j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-a47b1d3ed421]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1987

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