Seiko Cal. 4443 - 230

The Seiko 4443-230 represents an important milestone in Seiko's 1969 lineup. Powered by the 4443 caliber with 25j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-139cde9c48b4]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1969

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