No details on the date of it. This charger has a footprint of 13 1/2" x 17" and can be bench top or wall mounted. The large vacuum tube has a mogul light bulb base. Two wires entering one side are likely for 110 ac power and three wires enter another side. A ten position potentiometer, ammeter, momentary push button switch, rotary on/off switch, double fuse holder, and tube socket are mounted on the top.
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