Seiko Cal. 3891 - 633

This Hand-Winding model from 1967 features a 41mm PVD Black case. Powered by the 3891 caliber with 20j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-3d7739592d21]

Also known as: Goldfeather, Crown

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1967

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