Seiko Cal. 7178 - 341

This Spring Drive model from 1987 features a 40mm Titanium case. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-6ae0d4eb6c3f]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1987

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