Seiko Cal. 5221 - 236

This Spring Drive model from 1975 features a 37mm Stainless Steel case. With its 18mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-ca2f6df1e23e]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1975

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