Seiko Cal. 4439 - 899

Seiko 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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