Seiko Cal. 4420 - 991

The Seiko 4420-991 represents an important milestone in Seiko's 1976 lineup. Powered by the 4420 caliber with 25j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-2223c52c0782]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1976

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