I bought a pair of Zeiss Jenoptems 10*50 off the bay many years ago and had them serviced. They are by far the best value for money you will find anywhere if you get the real McCoy.
You really need to do your homework on this as a very high percentage of the ones on the bay are either out and out fakes or as you said built under licence. Either way they are inferior.
I found a German information document on how to spot the not right ones, it was 3 or 4 pages including pictures detailing everything from little things like the size of screw heads to the more obvious discrepancies. I'm sure I saved it somewhere but I'm buggered if I can find it.