Rob,
Yes, you are correct the TV chassis' are the same as used in all the '48-'49 RCA projection sets. If you want to see more of the set look here :
http://www.myvintagetv.com/rca_berkshire_regency.htm
I have a 8PCS41 that is restored and a 9PC41 not worked on yet. The 9PC41 has the remote control.
This is sitting on moving blankets, that's how we moved it into position. Since this picture was taken I put teflon coasters under it, great for wood floors.
Chuck