Seiko Cal. 6178 - 757

This Spring Drive model from 1981 features a 41mm PVD Black case. It features a Navy dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-a2acd64cb651]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1981

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