Universal Geneve Polerouter 215-9 – searching for appropriate crown

I recently bought this and have my watchmaker specializing in vintage pieces complete service for it. I found the appropriate buckle for it.

However, I'm having a difficult time ascertaining the proper crown (and logo). Where would the reference number be located so that I can search this list? https://universalgenevepolerouter.com/reference-tables/polerouter-steel-reference-table/

Thanks in advance.