Seiko Cal. 6631 - 624

This Quartz model from 1970 features a 46mm PVD Black case. Powered by the 6631 caliber with 27j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-8d00f38bd587]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

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