Thought this might interest the error people, but the ANA error collection has a 1943-D cent struck over a 1914-D Barber Dime. I know that wrong metal planchets aren't extremly rare, but this one was interesting because of the 40 year gap and the fact that the wrong planchet was a previously circulating coin that still has easily visible details. It made me think of the reference in Breen's Encyclopedia of (if I remember correctly) a 1970 Proof Quarter struck on a 1901 Barber Quarter planchet. Just thought you guys may be interested.
That is interesting how an older coin like a 1914-d barber dime would get mixed up in the minting process 29 years later. Almost seems like it would have been placed there intentionally to be struck over. Also, for a 1970 quarter to be struck over a 1901 barber quarter, 69 years later...odd.
Yes they have to be intentional. As such I'd be willing to pay five dollars or so for one of them as a novelty. As a created fabrication it has no real other value to me.
It could be that back in the day before all the stringent controls in place it just fell out of someones pocket on the catwalk and into one of the hoppers. Innocent things like that have happened before.
Conder: It may have been intentional, on the part of someone at the mint, but, it is still a legitimate error struck by the mint! I would love to own it.