Looks like MD to me. If you look at the 66 DDR, yours does not match on "CENT" http://varietyvista.com/01b LC Doubled Dies Vol 2/1966PDDR001.htm
looks cool to me, i would buy it, lol..others say no value, but go on ebay or usa coin book, it could get you a few dollars, people do buy them, i do if the doubling looks nice to me...nice to meet you