Seiko Cal. 5631 - 427

The 5631-427 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5631 caliber with 33j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-4e1bed9161ad]

Also known as: Goldfeather

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1977

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