Mike,
That is a most beautiful and rare early color TV. These 1953 models were generally described as 'FT' for Field test sets. RCA had a precurser to their own CT-100 called the Model 5 that was made to the tune of 200 copies and these were used as you report yours was to show the Jan 1st, 1954 Rose Bowl Parade color telecast at selected venues. The Model 5 looks identical to a CT-100 except it has a criss-cross woodwork grille latice instead of the rectangular pattern of the CT-100.
There are several vintage TV collectors here that are fortunate to own early 15" color sets, myself included. I'm sure they will all report in when they see yours. I think I can speak for us all in welcoming you to a very exclusive and small society and asking if you'd be so kind as to post many more pictures, especially of the insides.
Awesome!
Rob