Seiko Cal. 4539 - 187

The Seiko 4539-187 represents an important milestone in Seiko's 1981 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-6d5953a8ac4c]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1981

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