Seiko Cal. 4420 - 998

The Seiko 4420-998 represents an important milestone in Seiko's 1982 lineup. Powered by the 4420 caliber with 17j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-a9d368763c92]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1982

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