Vintage lot of 7 Winker Bakelite Christmas Light Flasher Blinker Adapter Plugs. New old stock. These items came from an estate sale of a family that owned a hardware store in the mid 1900s. When it closed, some of the stock went to their basement where it sat for many decades.
I had no idea what these were for when I purchased them. I just like the art deco look of them. I just plugged one on and attached a string of Christmas lights to it and after a couple of seconds they began to flash!