I have a 3-ply14x14 floor tom which was sold to me by a drumshop as a slingerland. It looks to have slingerland lugs, muffler and hardware, but if does not have a badge. It has a M on the interior shell and a date of 1965 (can't make out the month/day).
I just bought another floor tom that matches my kits wrap (this one doesn't) so I am looking to sell this guy. It's a wood finish. The top is screws aren't missing, I just took them off so I could photo the interior. PM if interested.