Seiko Cal. 6635 - 950

This Spring Drive model from 1970 features a 36mm Titanium case. Powered by the 6635 caliber with 34j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-bf0bdaf11585]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1970

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