Seiko Cal. 4521 - 188

Seiko 4521-188

The 4521-188 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-de5e9ba92a69]

Also known as: Sumo, UFO

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
37mm
Case Thickness
15.9mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
30m
Dial Color
Cream
Jewels
19j
Frequency
28,800 bph
Power Reserve
71 hours
Year
1967

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