More information on fakes. All this raises the question of the dangers in buying an acid etched piece of glass without seeing, feeling and touching it in person. First, from Marshall Ketchum of Genoa, New York.
Along this same line, several years ago in Washington state I saw a Black acid etched piece with an excellent fleur-de-lis signature as part of the pattern. It was a piece in a collection and I recognized that it could not be Steuben. The owner didn’t ask me about it so I didn’t say anything. I did have the opportunity to photograph it but didn’t. I have always been sorry that I didn’t take the opportunity to get a photo. I have wondered since how anyone can make money making forged Steuben pieces but it is becoming clearer that they can.

Then from Gwen Stebbins of Davison, Michigan on her experience.
Just to add a note to the ACB replica pieces that are on ebay….a few years back, I was cataloging for an auction house and a lamp base in jade and alabaster ACB was presented and for whatever reason, we decided to take it apart. To our surprise, it had an acid stamp mark “Czechoslovakia”. It was definitely old but was an exact copy of a Steuben ACB design. Without taking it apart, I am sure that 99 out of 100 people would have thought it to be Steuben.

Then a final note on the whites from Marshall Ketchum in response to David Chadwick-Brown’s comments.
The Corning elevator lights that are impressed “Ivrene” are in fact Calcite.