Seiko Cal. 4528 - 349

This Spring Drive model from 1965 features a 41mm Stainless Steel case. Powered by the 4528 caliber with 17j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-e704f67aaaa0]

Also known as: Monster, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1965

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