Seiko Cal. 6690 - 670

Released in 1977, the Cal. 6690 with design code 670 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-52eab8aefbb1]

Also known as: Monster, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1977

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