Most Twin,s (Legacy) and (pro) LNBs by DN provider are clearly marked on each side of the LNB, from holding it into your hands, left side will always be 119.0w, right side 110.0w.
Only until you get to a Superdish, SD105, or SD121, does the LNB postions change, also on the newer release's of the Dish1000.2 the LNB configuration is different, this dish looks like a PhaseIII by Dtv, but ofcourse is completely different.
Hope this is alittle more info for you,
0dd