Hi,
I've been checking out Flynn's book, 'Authoritative Reference on Liberty
Seated half dimes' and think this coin used either a die #1 or die #2.
Also some dispute seems to exist as to whether or not any of the 1861 over 0
Half Dimes are really RPDs; Flynn labels each of the four known die varieties as a 'so-called 1/0'...
Opinions on both of these points are needed.
Here's a close-up with lighting from the right:
