Ive got examples of these 'multiple' finishes all produced at the same time, sometimes on the same designs (mostly foreign or non-casino). Obviously Ive kept a few
Not sure whether it was experimentation or those finishes were actually available if needed.
I will say that those I spoke to who worked there in the early days say that John spent a fortune in materials, molds, equipment for producing 'new products' which never took off.
I need to try and write all this up some time.

Problem with all the foreign and non-casino stuff is we dont have much reference of what was actually in use to know if a lot of them were samples or otherwise. I will post something shortly that I found the other day.