Seiko Cal. 6690 - 691

This Quartz model from 1991 features a 37mm Two-Tone case. It features a Navy dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-61e402520968]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1991

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