Seiko Cal. 5633 - 907

The Seiko 5633-907 represents an important milestone in Seiko's 1971 lineup. Powered by the 5633 caliber with 33j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-3499e8937bdf]

Also known as: Sumo, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1971

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