Seiko Cal. 4427 - 683

The 4427-683 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4427 caliber with 20j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-5fd571d34d2d]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1987

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