Seiko Cal. 5641 - 842

This Spring Drive model from 1984 features a 36mm Hardlex-Coated Steel case. With its 19mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-4a81b7c02e6b]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1984

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