Seiko Cal. 6638 - 144

This Hand-Winding model from 1974 features a 45mm Hardlex-Coated Steel case. With its 19mm lug width and 14.2mm profile, it sits comfortably on most wrists. [seikata-wm-1b625b55e013]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1974

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