Seiko Cal. 5644 - 841

This Quartz model from 1980 features a 35mm Hardlex-Coated Steel case. Powered by the 5644 caliber with 33j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-6d4c8de7970f]

Also known as: Turtle, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1980

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