Seiko Cal. 4566 - 641

The 4566-641 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4566 caliber with 19j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-5d222849cf37]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1969

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