I found this page:

https://www.deltafaucet.com/bathroom/product/1323.html

It doesn’t look exactly the same, but it’s close. As far as I can tell, there could be a multichoice valve r10000 behind there or a different older one.

I’ll try to call delta faucet during the week and see if they can help me figure it out without having to call the plumber. The plumber is not readily available. The water needs to be turned off at the meter here, so I don’t want to open it up until I know what I am doing.

Maybe I should order a new trim kit first just in case I need it to turn the water off at the valve?

We will need to demo the tub surround before the plumber can come, to fix the subfloor. The surround is a one piece unit, probably fiberglass. I need to do some research on how to safely demo fiberglass. I will have to break it up into pieces in order to dispose of it.

I have delta faucets that are 14 years old. When I couldn't identify them on the delta site, I opened a ticket with them that included a picture of the faucet. Delta identified the faucet, sent me all of the rebuild parts along with a new handle for FREE!!