Hi,
Definitely a doubled die. It looks like CONECA 1-O-V also in the
CherryPickers' Guide as FS-50-1964D-101.
Nice coin and rare in MS-65 or above. Circulated examples even though very nice can be found in the $20.00 range. Some can be found in what a dealer would call scrap silver and are definitely worth looking for.
Have Fun,
Bill