Seiko Cal. 6687 - 691

This Quartz model from 1978 features a 45mm Titanium case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-a3b275a48dcf]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

9.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1978

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