Saw this movie on tv when I was a kid. it would've been the late 70's or early 80's, so my guess is that the film is from the 70's. I believe it was in color. A trio of thieves is going to rob what I think was the US Mint. I think at least one of the characters works there and it's an inside job. One of the the thieves, a female, has a photographic memory. The plan is to replace money that is scheduled to be destroyed with counterfeit money. In the end, I believe they succeed and get away with the real cash as the fake money burns. I'm pretty certain it was a straight up heist movie and not a comedy.