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Richoflex twin lens camera, help.? - google camera adapter

I have a fairly old camera I bought, which has 120 films, and I wonder whether there's a place that processes, such as pharmacy or should I go somewhere, especially

Secondly, the deployment of a 35-mm adapter, the background color, which seems impossible to know a place to find where a site or a place at the age of equipment, so that I can use say?

I checked eBay and Google multiple search terms, but I think you need more help if someone can help, thank you very much