Seiko Cal. 4428 - 672

This Spring Drive model from 1990 features a 35mm Hardlex-Coated Steel case. Powered by the 4428 caliber with 18j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-f43482cbab08]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1990

Related Models

• Seiko 6173-151
• Seiko 6397-828
• Seiko 6656-586
• Seiko 0767-557
• Seiko 6646-803
• Seiko 7164-395
• Seiko 7079-733
• Seiko 5249-329
• Seiko 6341-884
• Seiko 7127-368
• Seiko 6239-802
• Seiko 6682-660