Seiko Cal. 5639 - 307

Seiko 5639-307

The 5639-307 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-2976a286fb96]

Also known as: Turtle, Navigator

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
40mm
Case Thickness
14.3mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Black
Jewels
24j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1971

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