*Follow link for lots of pictures*
My USAAF Reenacting unit came into a couple of these carts. They came out of a defunct import/export and surplus dealer warehouse. By all appearances they had been sitting there in rotting crates since the 1950's. We were unable to salvage the crates unfortunately. Here are several pictures of one of them as well as a couple of excerpts from the pertinent TM on aircraft instrument testing. We only know of a few others out there so really have no idea on the value or where to even sell the carts we don't need for our group.
https://forums.g503.com/viewtopic.php?f=83&t=305937Matt