Seiko Cal. 4427 - 503

The 4427-503 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4427 caliber with 31j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-da0cdfc0f457]

Also known as: Monster, Arnie

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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