Seiko Cal. 6691 - 628

This Spring Drive model from 1966 features a 36mm Hardlex-Coated Steel case. Powered by the 6691 caliber with 35j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-456a8b4a60c8]

Also known as: Samurai, Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1966

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