Nice find David!

These are the Heathkit gimbals used in the Kraft '70-'73 5 channel series as well. These radios are likely to be very similar to the Kraft SS TX's from that period. The encoder layout might be slightly different. Other than the case and hopefully, a working gimbal (albeit with replacement of pots), there is little in these TX's that is worth salvaging IMO - they are just too old and definitely on AM - if they happen to work. Other than that though, they are great candidates for a conversion project.

David.