Seiko Cal. 5646 - 644

Seiko 5646-644

This Hand-Winding model from 1969 features a 43mm PVD Black case. With its 22mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-b86aa9a238cf]

Also known as: Navigator, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
43mm
Case Thickness
13.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
27j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1969

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