Seiko Cal. 4420 - 870

Seiko 4420-870

The 4420-870 is a sought-after Solar piece from Seiko's golden era. Powered by the 4420 caliber with 25j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-cfb4307813a8]

Also known as: Monster, Silverwave

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
14.8mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
170m
Dial Color
Green
Jewels
25j
Frequency
28,800 bph
Power Reserve
57 hours
Year
1990

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