No mint mark means it was struck at the Philadelphia Mint. It would be helpful if you could tell us what you think you see. From your photos IMO all I see is possibly some Die Deterioration Doubling on the obverse. Compare your cent to those on these sites: http://doubleddie.com/814997.html AND: http://varietyvista.com/01b LC Doubled Dies Vol 2/DDO 1963.htm
