Seiko Cal. 4428 - 990

The Seiko 4428-990 represents an important milestone in Seiko's 1989 lineup. Powered by the 4428 caliber with 17j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-875427beeffc]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1989

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