Seiko Cal. 6637 - 164

This Hand-Winding model from 1977 features a 36mm Titanium case. With its 19mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-82937c44aa66]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1977

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