Hello and welcome to The House of Chrome.

 You are looking at two used (B3F model) 3 pin female microphone cable connector from the 1950's or 60's. These vintage connectors were commonly used with Turner, Shure Carlson Stromberg and a whole wide variety of other microphones, cables and equipment from over the decades. Connector works like new but will need to be soldered to cables or equipment of choice. 

 These were very commonly used with the Shure 55, 55s, 737A and several other pre-1970 Shure model mics with the older style screw on cables. You can see in pic # 4 & 5 how these were installed on those older mics. You'll just need the small screw to keep them in place as no screw in included. These will be great for any audiophile that chooses to use older period equipment.

 There is no wear on these connectors.

 The standard 3 pin arrangement is as follows...

 # 1 is Shield.

 # 2 is Positive.

 # 3 is Negative.

 You'll appreciate using these connectors with the older mics I assure you. $3.00 a piece makes this a pretty good deal and all three connectors are included.

 MICROPHONE AND ADAPTER SHOWN IS NOT PART OF THIS SALE...FOR DISPLAY PURPOSES ONLY. 

  As with all my vintage microphones and stands...