I have an older Van Haney T model (I believe). It has no T or B stamp (or any other specs) stamped on it, but I'm fairly sure it's a tenor (was my Dad's). Does anyone know what year Giardinelli started putting the Symphony stamps on them? The only stamp on it says Giardinelli-New York. Thanks for any help.

My best guess is it's from about 1970 or slightly before.