Seiko Cal. 5633 - 552

The Seiko 5633-552 represents an important milestone in Seiko's 1978 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-3fcde919b69c]

Also known as: Sumo, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1978

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