This disturbing response from Lon Knickerbocker of Dansville, NY.
For what its worth,
Because I travel so much and am at so many auctions, shows etc., I make mental notes on unusual happenings. I have seen at least a half dozen of these green aurene decorated bottles in the last 18 months, some lay downs and some standing. All the bottles are quite small and seem very well done, and generally are priced quite high. I’m not suggesting one way or the other, but in all my years doing this I had never seen a one until recently,
To this observation from Lon, add the fact that the silver cap has markings that relate to the period of 1860-1915. Original or reproduction? Intentional to deceive?

Another collector of some experience and note says in his opinion this scent bottle could certainly be contemporary.

Finally, another collector says: I think you may have hit on it; latest photo makes it look like Loetz glass to me (not an expert at all but I have a couple of Loetz vases in similar green with America silver fittings and overlay) – and of course with Loetz unless it was made in just a couple of the later years of 19th century or modern, it would not be signed – I had been under the impression from earlier discussion that it had an irridized (“aurene”) finish but apparently it does not. It looks in this photo that all the color is within the glass. I have no idea whether Loetz made millifiore designs. And then several collectors have observed that whatever the make, the piece is exquisite. So, if you see something similar on the campaign trail be alerted and please let us know.

David Donaldson of Orlando provides some interesting analysis on how to qualify
a piece of glass. Mr. Donaldson will be one of our featured speakers at our Sept.
18-20 Symposium in Corning. He’ll be addressing comparisons and contrasts of
Mr. Carder to his contemporary glass makers. Should prove fascinating.
Just an observation I would like to mention concerning the green decorated “lay down” perfume. I am unable to tell from the pictures, but the green appears to have a colorless casing which is decorated and iridized….this would eliminate Tiffany, Steuben, Quezal, Durand, Loetz, Kew Blas, Trevaise, etc.; if not we can still eliminate Quezal, Durand, Loetz, Kew Blas, Trevaise.
Secondly, the interior view of the mouth appears to be fairly rough in its finishing…not in keeping with older companies where attention to detail was important. Thirdly, also unable to determine from the pictures, has the inside of the neck been gently ground to accept a stopper. Judging from the quality of the Blackington decorated silver top, I would imagine that a glass stopper was to be carefully fitted. Just some thoughts for a Tuesday morning.

Dealer David Goldstein of Naples, FL adds some finishing thoughts:
I concur with Lon. Although I thought the lay down was by Gilvey, he is the best
judge of his own work. I too have seen a couple of perfume bottles in Green
Aurene with Millefiore decoration that were being sold as Steuben. In one
instance the dealer was someone I knew well enough to tell him that I felt the
perfume was not Steuben and he pulled the piece from sale at the show where I
saw it. In another instance it was a dealer who had other suspect items so I
chose not to get into an argument.

Collector, Dick Stark, of Bethesda, MD on the subject of “buyer beware” says:
It is a lovely new object. but it is a deliberate effort to mislead. the maker
should have marked his studio name and date. i wonder how he distributes
them…probably auctions.