I agree with shadowtrooper78 on you coin being VAM23 nice little TOP100 coin! Doubled Profile, while not exceedingly rare, it's quite desirable as a collectible
VAM, your specimen appears to be in AU condition, there are about 100 listed known in UNC+ grades.
Check out
http://www.vamworld.com/1878-P+VAM-23This should give you all the diagnostics you need to figure out if your coin matches up.
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013!
ANA Life Member #3288 in good standing since 1981, ANS, Early American Coppers Member (EAC), Colonial Coin Collectors Club member (C4), Conder Token Collector Club member (CTCC), Civil War Token Society (CWTS) member, Liberty Seated Collectors Club (LSCC) & Numismatic Bibliomania Society member (NBS), USMex, Member in good standing, 2¢ variety collector.
See my want page:
http://goccf.com/t/140440