Seiko Cal. 6691 - 712

This Automatic model from 1977 features a 43mm Two-Tone case. It features a Black dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-e2429ee751d8]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1977

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