♬ ♭ Happy Birthday Dear Robert ♪ ♫ \ (•◡•) /

The Riverside metal ashtray is unlisted on Mark Englebretson's site.
Click on Reno/Sparks at the top and in the left side bar click on Riverside Hotel:
http://www.nevadacasinoashtrays.org/

I have the Barney Vinson book, it's a great read.
I'll have to keep my eyes open for that Perry Mason book!