Seiko Cal. 4421 - 920

Seiko 4421-920

The 4421-920 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4421 caliber with 20j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-092ed8a15eb0]

Also known as: Turtle, Monster

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
46mm
Case Thickness
13.1mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
70m
Dial Color
Black
Jewels
20j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1991

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seikata-wm-092ed8a15eb0