Seiko Cal. 5631 - 628

This Automatic model from 1968 features a 41mm PVD Black case. With its 22mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-4cb6fd10c2c1]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1968

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