Seiko Cal. 5638 - 907

This Hand-Winding model from 1975 features a 40mm Gold-Plated case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-73274beb34b3]

Also known as: Sumo, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1975

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