Seiko Cal. 7131 - 691

This Hand-Winding model from 1978 features a 46mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-a00cc9488db2]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1978

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