I was going to stop bidding at $3,249.99 so I might not get this one!
I heard about the Monte Carlo after the auction. I am glad to know who I am competing against.

Albertype I believe made the brown toned cards not a true black & white real photo.
It does not ring a bell. The Opera House was in Virginia City. I could probably find some info. in one of my Vegas books but they are in Vegas.