> AMG cels seemed to be mired in doubt.

It's only concerning the OVAs. But yes, when
buying a AMG OVA cel, there is always a 
possibility that it's an AIC reproduction cel.

> Clarification of AIC marketing practices

There is nothing realy special about that : When 
they made those reproductions, cels didn't had 
such a high value. Later, everybody agree that it 
was a mistake and they should have do something so 
that those cels couldn't be confused with 
production one. But it was already too late and 
nobody, including AIC, had a list of those cels 
that were reproduced.

AIC is by far not the only studio to have done 
such things : TOEI did it with some Sailor Moon 
cels (perhaps others too ?). Very recently, Studio 
Pierrot did it for several of their anime, 
including KOR, YuYu Hakusho, Hyper Police and a
couple of others. I seems to remember that there 
is also some on Utena...
All those cels have one thing in common : they are 
copies of real cel, made by the studio, on regular 
cel sheet using the same material. Which mean
that you can't make the differance with a 
production just by looking at them.

At least, after their first mistake, AIC stoped 
producing such copies. Which is not the case of 
some other studio.

Cheers,
Yann Stettler