Seiko Cal. 7187 - 923

This Hand-Winding model from 1965 features a 37mm PVD Black case. It features a Black dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-c7c761890b3c]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1965

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