Seiko Cal. 6131 - 575

This Automatic model from 1975 features a 36mm Gold-Plated case. With its 22mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-c51616ef63e1]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1975

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