Of all the T-368 transmitters known to have been manufactured, and yes there are ways to track these things, only a few are known to still exist.
Email me to add yours to the list!
Total manufactured: 2251
Total known units: 103
I remember visiting Fair Radio in Ohio in the lat 1990s, and seeing stacks and stacks of these sitting inside warehouses, outside rusting away, in various states of repair.