Yeah, unfortunately the 1966 is one of the highest counterfeited Cubans. Also, they are one of the most expensive Cohibas on the market fetching $600 per box of ten cigars...
By looking at your cigars, the only thing that looks suspicious is the dark wrapper and the non uniform size. These are supposed to be the same size, to the mm and should have the pigtail !!!
I know Frigpig is a big Cigar Aficionado, but the 1966s do not have a seal and hologram on the wooden box. The box is in fact genuine!!! The outer box which is beautiful by the way... has all the security features!!!