Seiko Cal. 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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