Seiko Cal. 6638 - 767

This Spring Drive model from 1984 features a 40mm Titanium case. With its 22mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-ff5564780a10]

Also known as: Pogue, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1984

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