Seiko Cal. 4528 - 309

The Seiko 4528-309 represents an important milestone in Seiko's 1980 lineup. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-f5f2b23ef3fb]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1980

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