Seiko Cal. 5638 - 380

This Spring Drive model from 1977 features a 34mm PVD Black case. Powered by the 5638 caliber with 35j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-130c3366febd]

Also known as: Sea Horse, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1977

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