Seiko Cal. 4428 - 443

This Hand-Winding model from 1990 features a 40mm Gold-Plated case. Powered by the 4428 caliber with 25j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-33d90dcf044f]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1990

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