The new generation of OP36, which came out last year, has lugs that are noticeably thinner. Same thing for the DJ36: the newer references 126XXX have a more streamlined, less blocky appearance than the previous 116XXX references they supersede. I am 99.99% certain that the new Explorer 36 has an identical case to the new OP36, except for the bezel, which has a flat section on the former, and rounded on the latter.