Seiko Cal. 4487 - 439

Seiko 4487-439

This Hand-Winding model from 1965 features a 40mm Hardlex-Coated Steel case. Powered by the 4487 caliber with 30j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-3e3d0e382ae6]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
15.8mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Green
Jewels
30j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1965

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