Seiko Cal. 4577 - 997

The 4577-997 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4577 caliber with 25j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-bb3936aa9110]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1976

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