Seiko Cal. 5637 - 218

This Spring Drive model from 1978 features a 34mm Two-Tone case. Powered by the 5637 caliber with 18j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-b2ec188bd3d2]

Also known as: Samurai, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1978

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