Seiko Cal. 4420 - 155

Seiko 4420-155

This Hand-Winding model from 1968 features a 45mm Hardlex-Coated Steel case. Powered by the 4420 caliber with 30j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-f7b718df802e]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
9.2mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Green
Jewels
30j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1968

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