1910-D Barber Half
Here is a fascinating story I ran across, knowing a brother of the party involved. Apparently a 1910-D Barber half that was never supposed to be placed in circulation was gotten in change at Durez Chemical in Niagara Falls, NY back in the late 1970's.
The coin did not sell at the mentioned show, and was sent back to Wilson, NY in the mail. It never arrived. There is a good chance this coin is still out there.
Collector of Victoria, Edward VII, George V and George VI Canadian; and most anything U.S. I am currently looking for early Lincolns, raw in XF or better.