This doo-dad was kept, I think as a spare part for the 1954 Klipschorn that my grandfather had for sale in his shop. What's it for? (I inherited this and the speaker, but I'm not versed in the technical side.)
Would this MID-T be a replacement part for something the speaker already had, or would it have been an upgrade? It's possible that this part came with the speaker and that whatever was shipped by University Loudspeakers was the upgrade and got installed in 1956. In other words, does the sales slip for a model MIT-60 match the object pictured?
Thanks!