Somebody knows... Maybe you?
That looks great. I have exactly the same Rialto model in full working condition. Got mine from the late Harold English. They work great on the new 20p coin and make a very nice money box.
Mine seems to use Canadian nickels ok.
Can you post a photo(s) of your money box? Mine is missing one.
Sorry I've been away. As soon as I'm able to access my Rialto I will photo the cashbox. My machine is in a loft eave cupboard behind some stuff and I've recently had surgery and not allowed to lift for a couple of weeks. I won't forget to do it for you.