In the 1954 British film "Mad About Men", Glynis plays Miranda, a mermaid who has some Spanish gold doubloons and needs cash. She is accompanied by Margaret Rutherford as a nurse and they head for a pawn shop. Entering a full-service pawn shop: Making friends with the pawn broker: Picking up the cash: More on my website under "Coins in Movies - Mad About Men"
I checked your website & it lists several neat coin related TV and movie links. There was an I Love Lucy episode where Ethel & Lucy roll search & find a rare cent. They subsequently loose the coin which causes Lucy to cry. It might be fun to find & watch that show again. I didn't see it on your list of TV shows.