Seiko Cal. 4528 - 524

The 4528-524 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4528 caliber with 27j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-d9c2dd1cfd4b]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1972

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