Seiko Cal. 6643 - 656

This Kinetic model from 1987 features a 36mm Hardlex-Coated Steel case. Powered by the 6643 caliber with 17j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-300f4c45cef2]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1987

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