Patrick - that's great! If you (and he) want, give him my email address. I'd love to have someone to chat with about engraved glass. I was just telling a friend of mine, I didn't understand why I hadn't run across anyone who was interested in it.
Carolyn - etching uses acid to form the pattern, while engraving (a type of cutting) uses copper wheels with a slurry of oil and grit, stone wheels, and these days also diamond-impregnated wheels. If you look at engraving with a magnifying glass you can see striations created by the wheel (unless it's very highly polished). There are also often characteristic shapes created by wheel cutting, while etched patterns don't have restrictions on the shapes created. Usually etched patterns have not more than a few different depths (often only one) corresponding to the amount of time the glass was in the acid bath, while cut/engraved patterns can be any depth. I disagree that etched patterns feel raised.
Etching was first discoved in Sweden in 1771, but didn't really catch on until the mid 19th C; engraving has been around for thousands of years.
Krsilber
From the colour , thickness and engraved of your glass. I don't think it is earlier than very late 19th c and may even be early 20thc. The pattern is certainly not typical Victorian. More like sort of Art and Craft period. Your glass is very nice but l think you are under estimated the skill of some of the past engravers. The products of the past engravers in England and Bohemia were so high and only you can go to the glass museum than you will see what l meant.Your piece is miles away from the museum type sorry to say.
I'm afraid I disagree with some of the things you say. The design on my goblet is Renaissance Revival style, not Arts and Crafts. It was used extensively by Lobmeyr (for one) from about 1870-1890. From what I can tell, it doesn't seem to have been very popular in England, though I have seen some Pellat pieces that are reminiscent of it. I believe it was more popular in France, but I don't have the references for it.
I wasn't underestimating the skills of engravers of any period, I was saying that this particular style required a kind of skill that I haven't seen demonstrated by 20th C engravers. There were certainly many phenomenal engravers around in the early 20th C right up until today. But if you look at the designs they did you will find few examples of tight curves with fine lines.
Engraved glass is my particular interest, and I've seen a lot of it. I took hundreds of photos of engraved glass at the Corning Museum, and the quality of the engraving on this glass is on par with many of those examples. I don't know why you say the quality is miles away from pieces in museums.