Ok - now for the real info... (which T-Bird has already shared...
)
In 2003 ALL Corvettes received the 50th Anniversay badges. (even 2003 Z06's)
There was also a 50th Anniversay Package that included unique paint and a number of "optional extras" as standard.
The real truh is that the 50th Anniversay package was no better than a regular coupe optioned out - but was more expensive - in some cases dealers marked em up $20,000 over sticker...
So - not to detract from your dad's car - it is just another 2003 Coupe.
Nice car none the less...
Your dad isn't a hair-dresser is he?