Seiko Cal. 4537 - 680

Seiko 4537-680

The 4537-680 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4537 caliber with 35j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-6bb0cda6ce8b]

Also known as: UFO

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
46mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
70m
Dial Color
Black
Jewels
35j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1976

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