Seiko Cal. 5643 - 870

Seiko 5643-870

This Kinetic model from 1965 features a 37mm Hardlex-Coated Steel case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-440d39bef124]

Also known as: Sumo, Tuna

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
12.2mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Green
Jewels
28j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1965

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seikata-wm-440d39bef124