Seiko Cal. 6691 - 667

The Seiko 6691-667 represents an important milestone in Seiko's 1980 lineup. It features a Navy dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-9b92b41e0a65]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1980

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