UPDATE: **SOLD** Was on eBay.
stin forwarded this unusual item. Some defrosting units were used during WWII, though those were 12 volt. They vary in price from $35 to over $100 depending on condition and completeness.
“Defroster kit that attaches to windshield and has a switch that mounts under dash and a fuse protector. 12-Volt.
Made by Durkee-Atwood Co.
It comes in the original green metal box
Also have an extra defroster switch and the original green metal box”