Seiko Cal. 0771 - 631

The 0771-631 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0771 caliber with 20j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-66f66a2c4be8]

Also known as: Crown, Flighty

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1980

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