http://www.vintage-drum-net.de/collection/slingerland/30hollywoodacerk.htm
The link above has your drum. No reason why the hoop shouldn't match up with the badge, as this one does. Not a hard and fast rule to my knowledge.
The 16 Beaver tail lugs is what makes the difference as to the Radio King versus Hollywood Ace.
I'm not positive that these drums were always one ply...I think there were also some three plies on the market as the Hollywwod Ace and the other Buddy Rich Model...not 100% sure but....
Here's a bit of info from another site:
]All Radio Kings are not single ply and all single plys are not radio kings.
Most single plys are Radio Kings but some of the Hollywood Ace models until the late 50's I believe and some of the Artist Models are single ply as well.
I think the three point strainer and the clamshell would designate as the older Radio Kings and they were both single and multi ply.
I have a single ply artist from the 60's and have had a 50's radio king multi with mahogany interior.
Hope this helps...[/I]Mine sounds great and I'm sure yours does as well.
Best,
radiokng1