I got email from a fellow looking for a new home for his working TT-271A KSR and TT-272 reperf-transmitter.
I put his photos at the bottom of this page -
These make up the FGC-52X system. They are covered in change 1 of the FGC-25 manual on my page -
Pick-up only, but I can arrange to get them and deliver at the Dayton/Xenia hamfest. Let me know if you want them and can pick-up in NC or at Dayton and I'll put him in touch with you.