Seiko Cal. 4427 - 540

The 4427-540 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4427 caliber with 18j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-b3346edcbcd0]

Also known as: Samurai, Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1972

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