Seiko Cal. 6646 - 812

The Seiko 6646-812 represents an important milestone in Seiko's 1972 lineup. Powered by the 6646 caliber with 33j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-d5cba8b08bf2]

Also known as: Monster, World Timer

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1972

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