Seiko Cal. 4487 - 380

Seiko 4487-380

The Seiko 4487-380 represents an important milestone in Seiko's 1984 lineup. Powered by the 4487 caliber with 34j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-b115eaa74a15]

Also known as: Bellmatic, Sea Horse

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
13.9mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
40m
Dial Color
Black
Jewels
34j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1984

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