Seiko Cal. 6138 - 551

This Spring Drive model from 1975 features a 36mm PVD Black case. It features a Navy dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-1bc6534e0fbc]

Also known as: Monster, Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1975

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