Seiko Cal. 6628 - 438

This Spring Drive model from 1972 features a 39mm Gold-Plated case. With its 22mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-49ac1d155c3b]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1972

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