Seiko Cal. 4435 - 531

This Spring Drive model from 1971 features a 41mm Two-Tone case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-631bd70480f5]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1971

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