I bought this snare drum about 35 years ago in a pawn shop. I quite literally forgot that I had it until it resurfaced a few weeks ago. It has no badge or evidence of a hole where a badge was. The hoop says Slingerland Radio King and all parts (other than missing snare strainer) appear to be original. I'd really like to know the approx. year and that in fact it is Slingerland. Any help will be greatly appreciated.