Great question! If you look at the "5" in "50 C." on the bottom of the reverse, you can see the imprint of an originally punched "50 C." with an
" inverted/upside down 5"
under the 5. The "upside down 5" appears to look like a "2" under the "5" thus these die marriages (O-111 and 112) ended up being called "50 over 20" mintings.
(Note: Parsley in the 4th edition of United States Early Half Dollar Die Varieties 1794-1836 states a "2" was originally used on the first "50 C". rather than an "upside down 5". I disagree. I think it's far more likely to have been a "5" misapplied.)
1807 Capped Bust Half Dollar (50 over 20, O-112)
Posted 05/31/2012 07:18 am
Actually, ANY Capped Bust Half Dollar is astounding!! 
