Seiko Cal. 6639 - 764

This Hand-Winding model from 1977 features a 44mm Gold-Plated case. Powered by the 6639 caliber with 33j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-66ed348c8ca6]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1977

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