They are pretty much worthless.They are 1 1/8 " wide and 5/8 tall. The lady I did a job for had several bags of these in her garage and wanted to know what they were worth. I told her I didnt know but if I could find out anything I would let her know.
Fahnestock clips are definitely in the right ballpark. I will do some research and let her know.
Correct, you push the spring down and slide the wire in from the side under that small hook. them release the spring and it holds wire in place. The were very common in the buzzers in old bell/buzzer systems in apt. buildings and in institutional sound/paging systemsThey are spring connectors. Can be used for speakers or bell wire.