Seiko Cal. 7138 - 312

This Spring Drive model from 1969 features a 45mm PVD Black case. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-4cfb3d99efa8]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1969

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