Seiko Cal. 4528 - 377

The 4528-377 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4528 caliber with 22j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-5fc39b544adb]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

22j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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