Seiko Cal. 4428 - 837

The Seiko 4428-837 represents an important milestone in Seiko's 1966 lineup. Powered by the 4428 caliber with 33j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-189aba3aa1cb]

Also known as: Rally, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1966

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