Seiko Cal. 4487 - 340

Seiko 4487-340

The 4487-340 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4487 caliber with 31j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-436a94760c80]

Also known as: Rally, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
10.5mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
90m
Dial Color
Green
Jewels
31j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1995

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seikata-wm-436a94760c80