Seiko Cal. 4539 - 724

The Seiko 4539-724 represents an important milestone in Seiko's 1980 lineup. It features a Green dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-8e16ae3fd2d1]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1980

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