Seiko Cal. 4540 - 812

This Spring Drive model from 1972 features a 42mm PVD Black case. Powered by the 4540 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-ec1163d0fb22]

Also known as: Monster, Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1972

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