Seiko Cal. 6633 - 775

This Spring Drive model from 1967 features a 42mm Titanium case. Powered by the 6633 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-195c4f34be84]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1967

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