Seiko Cal. 4428 - 721

This Kinetic model from 1980 features a 40mm Hardlex-Coated Steel case. Powered by the 4428 caliber with 28j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-acf3f7c9277d]

Also known as: UFO, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1980

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