Seiko Cal. 6691 - 155

This Hand-Winding model from 1978 features a 41mm Gold-Plated case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-4e1fdff1c7d6]

Also known as: Tuna, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1978

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