Seiko Cal. 5644 - 948

This Spring Drive model from 1979 features a 36mm Hardlex-Coated Steel case. It features a Navy dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-6a57fd954d86]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1979

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