Seiko Cal. 6663 - 310

The Seiko 6663-310 represents an important milestone in Seiko's 1980 lineup. Powered by the 6663 caliber with 21j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-504d570269b3]

Also known as: Monster, Flighty

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1980

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