Seiko Cal. 4531 - 288

Seiko 4531-288

The 4531-288 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4531 caliber with 20j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-264fc35af4eb]

Also known as: UFO

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
14.4mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Green
Jewels
20j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1979

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