Seiko Cal. 4428 - 712

The Seiko 4428-712 represents an important milestone in Seiko's 1998 lineup. Powered by the 4428 caliber with 31j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-995ca45ecfa7]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1998

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