Set of 2 Vintage Black unmarked / GE Porcelain Tungar Battery Chargers

Description

I think these are vintage battery chargers from what I can find online. I did not plug them in due to their vintage nature. These have a heavy "brick" feel to them
Measurements:
Black: 6-1/8" x 4-1/8" x 2-3/4"
GE Porcelain: 4-1/2" x 4-1/4" x 2-1/8".
The bulb does unscrew / screw just fine on the black on and at least one cord is not original, but there seem to be two probes connected to other wires here.
No bulb on the GE porcelain item.
Since these are so heavy, I am packing them tight in a regional shipping box for the most economical rate.