Seiko Cal. 4478 - 521

The Seiko 4478-521 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-5687200a6578]

Also known as: Sportsmatic, Arnie

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1972

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