Seiko Cal. 5664 - 427

Seiko 5664-427

This Hand-Winding model from 1968 features a 46mm Titanium case. With its 21mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-6da6f371ab43]

Also known as: Sumo, Helmet

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
46mm
Case Thickness
13.7mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
40m
Dial Color
Silver
Jewels
34j
Frequency
36,000 bph
Power Reserve
62 hours
Year
1968

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seikata-wm-6da6f371ab43