Seiko Cal. 4539 - 643

This Spring Drive model from 1970 features a 38mm Two-Tone case. The Fixed bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-48feb5cbc218]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1970

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