Seiko Cal. 4439 - 899

The Seiko 4439-899 represents an important milestone in Seiko's 1976 lineup. Powered by the 4439 caliber with 25j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-3cc2eb8c3f3b]

Also known as: Sumo, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1976

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