Seiko Cal. 0731 - 437

This Spring Drive model from 1966 features a 42mm Two-Tone case. With its 19mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-b9e08ff50b97]

Also known as: Shogun, Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1966

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