Re: Early Conn Saxophones
PATD I believe is patented, which would be when the Conn name was established. So that could be when the company started, not when the sax was made. It may have been interpreted wrong by the owner.
But don't go give the owner crap about it, because I may be wrong. THe other numbers are most likely just product numbers. They're like ID numbers that tell which one it is and what number it was in the assembly line(If they made them with assembly lines...hell if I know.)