Seiko Cal. 6688 - 690

This Automatic model from 1977 features a 40mm Two-Tone case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-bedf437ee5d8]

Also known as: Bullhead, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1977

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