When I first heard of the story, the first thing I said was that I would have taken the one worst (or smallest) coin to a broker or collector to see what I could get for it.
If any questions were asked it's always plausible to say; "It's been around my hose for a long time and I'm not sure where it came from."
That experience would probably be all the education needed to decide what to do with the rest.
“It’s been around my hose for a long time and I’m not sure where it came from.”
Might want to see a doctor about that!