Seiko Cal. 4420 - 155

Seiko 4420-155

The 4420-155 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4420 caliber with 21j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-7b50cb27a685]

Also known as: Bullhead, UFO

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
9.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
120m
Dial Color
White
Jewels
21j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1991

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