Maybe it is not Lexan then, but I have seen thick poly-carbonate “glass” used for partitions and the like that prevent people from attacking the people inside. It isn’t flexing or sagging as a structure. It may flex under a hit with a hammer, which is good, it just doesn’t break. Same with the sandwich with glass,the glass breaks, but the poly-carbonate layers keep it intact.
Yes it is pricey, but if you have 10 watches worth $10k or more each, it would probably be worth the security. But maybe this place is more of a “Zales”.
