From what I remember of the ones I have seen 
myself, the repro cels may be numbered but not in 
a way that is normal with cel production. Most 
have a number with no letter (125 or 18 rather 
than A6). I suggest you drop an e-mail to curt at 
Asylam. He has a substantial collection of AMG OVA 
and the repro and usually his advice on figuring 
out real versus fake is quite useful. It may also 
be worth asking Yann directly for info, since I am 
sure he has seen a number of the repros when out 
cel buying.

Marcus