Seiko Cal. 5291 - 331

This Hand-Winding model from 1966 features a 43mm Two-Tone case. With its 21mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-535cf58ee45e]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1966

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