Seiko Cal. 6638 - 836

This Hand-Winding model from 1965 features a 36mm Gold-Plated case. With its 18mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-3402da055594]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1965

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