Seiko Cal. 4577 - 444

The 4577-444 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4577 caliber with 17j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-a3e23cfaa46a]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1981

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