Seiko Cal. 4528 - 616

This Hand-Winding model from 1988 features a 37mm PVD Black case. Powered by the 4528 caliber with 31j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-3bf970b57602]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1988

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