Condor101 hit the nail right there "they didn't make
Half Cents from 39-49 so no planchets would be laying around to be mixed in with large cent production. The mint didn't make the planchets they were supplied by outside sources so I say Chinese or acid until we can see photos of both sides and the edge.
"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