Seiko Cal. 5640 - 144

Seiko 5640-144

This Solar model from 1983 features a 45mm Hardlex-Coated Steel case. With its 19mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-a01a6e45309e]

Also known as: Navigator, Crown

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
13.6mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
17j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1983

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