Seiko Cal. 4431 - 860

Seiko 4431-860

The Seiko 4431-860 represents an important milestone in Seiko's 1974 lineup. Powered by the 4431 caliber with 35j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-5c1b74f99b73]

Also known as: UFO, Arnie

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
38mm
Case Thickness
13.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
180m
Dial Color
Black
Jewels
35j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1974

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