Seiko Cal. 6643 - 537

Seiko 6643-537

The Seiko 6643-537 represents an important milestone in Seiko's 1985 lineup. Powered by the 6643 caliber with 34j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-867d03b38aad]

Also known as: Monster, Rally

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
14.2mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
140m
Dial Color
Cream
Jewels
34j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1985

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