Seiko Cal. 4537 - 647

Seiko 4537-647

The 4537-647 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-108d90c6074f]

Also known as: Turtle, Navigator

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
43mm
Case Thickness
9.6mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Black
Jewels
33j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1980

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