Seiko Cal. 4431 - 587

Seiko 4431-587

The Seiko 4431-587 represents an important milestone in Seiko's 1973 lineup. Powered by the 4431 caliber with 36j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-2bea5787bc9b]

Also known as: UFO, Golden Tuna

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
45mm
Case Thickness
15.0mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
30m
Dial Color
Silver
Jewels
36j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1973

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