Seiko Cal. 5638 - 641

This Kinetic model from 1973 features a 43mm Two-Tone case. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-05edcd99d81c]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1973

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