Here is a very old K&D variable resistor – to control filament current control for early radio batteries, from back when people built their own incredible crystal radio sets. Made from a round wood base, coil, dial and posts. Nice!!!!!
I love vintage electronics and hope you do too. This item is surplus from the Paquette Museum, the world’s largest vintage microphone and radio collection. Take a look at other items in my eBay shop. Feel free to contact me with any questions. I will be posting many items over the next few months so keep checking back.
Price is for item as-is. I use USPS for domestic shipping. I do not ship internationally at this time.