I have seen several online in auction websites that claim to be genuine O`Dea lithograph but this is another that is easy to prove or disprove. The ones I have seen on ebay have been much smaller prints. .
EASY ONE.. The GENUINE Lithiographs measure 40 inches by 60 inches and had a felt border. The ones I have seen have the origional hardwood frame.
You can see what an origional looks like along with measurements, and details about the real McCoy at
" GENUINE O`DEA LITHOGRAPH".