Seiko Cal. 4577 - 636

The 4577-636 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4577 caliber with 20j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-46535c3bbd67]

Also known as: Sea Horse, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1979

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