Seiko Cal. 6631 - 750

This Solar model from 1970 features a 37mm Gold-Plated case. Powered by the 6631 caliber with 28j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-3f076ea5f45a]

Also known as: Goldfeather

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1970

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