Seiko Cal. 4420 - 371

The 4420-371 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4420 caliber with 32j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-70c1556e4048]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1983

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