Seiko Cal. 4577 - 623

The 4577-623 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4577 caliber with 34j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-5fa901ae8c39]

Also known as: Bullhead, Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1985

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