Seiko Cal. 5644 - 421

Seiko 5644-421

This Kinetic model from 1971 features a 46mm Titanium case. With its 20mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-30e965a4e4b2]

Also known as: Bullhead

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
46mm
Case Thickness
11.0mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Burgundy
Jewels
33j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1971

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