Seiko Cal. 4577 - 701

The 4577-701 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4577 caliber with 29j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-0e18851cec1b]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1991

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