Description
See pics. i was told these were used in old houses early 1900's but these came with a large lot of ham radio parts. Two different types. There are the halved ones that fit together. They have a patent mark 240851611 its tough to tell the ones could be 7s so it could read 7677 instead of 1611. I looked up both patent but did not get a result. Any questions just ask. Will ship in medium flat rate box or straight shipping. See shipping details for prices