Seiko Cal. 6639 - 767

The 6639-767 is a sought-after Solar piece from Seiko's golden era. Powered by the 6639 caliber with 22j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-4012ecb81f65]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1971

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