Seiko Cal. 6634 - 628

This Spring Drive model from 1967 features a 34mm PVD Black case. Powered by the 6634 caliber with 19j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-f5b6297c18ce]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1967

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