Seiko Cal. 5231 - 616

This Hand-Winding model from 1970 features a 37mm Two-Tone case. With its 21mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-d8666683efce]

Also known as: Pogue, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1970

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