Seiko Cal. 6691 - 188

The Seiko 6691-188 represents an important milestone in Seiko's 1975 lineup. It features a Silver dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-b588e42009ca]

Also known as: Rally, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1975

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