Seiko Cal. 5637 - 278

This Hand-Winding model from 1970 features a 44mm Titanium case. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-725f7a415f00]

Also known as: Rally, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1970

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