Seiko Cal. 4539 - 643

This Spring Drive model from 1981 features a 37mm Two-Tone case. It features a Burgundy dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-941ca9876574]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1981

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