This listing is for five new old stock 2 pin male plugs or connectors used in the RECORD cancel circuit of the Seeburg M100A, M100B, M100BL, M100C, 100W, HF100G, HF100R, 100J and 100JL jukeboxes.
These models use either the WSR3-L6, WSR5-L6 or WSR7-L6 Selection Receiver.
The jukebox has a small cancel button on the back and the contact which this button energizes plugs into the 2 hole female socket on the bottom end of the Selection Receiver.

These plugs are also used on the Remote Volume Control associated with each of these models.
It has many other applications also, such as the tone arm input to the amplifier in AMI models A, B, C and D.
Another use is for the 6 volt Accessory Light socket in the BM1000 Background Music phonograph.

This male connector or plug is new old stock and has never been used.
I do not have the covers for these plugs.