Seiko Cal. 6690 - 780

Released in 1989, the Cal. 6690 with design code 780 was part of Seiko's domestic market collection. Powered by the 6690 caliber with 27j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-3acf25aea82f]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1989

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