top rim not folded then ........ possibly described as slightly everted or turned outward.
sorry, no idea of the U.S. edition - but I don't see a glass quite like this in my U.K. copy of Bickerton - however, am inclined to revise my description of the bowl shape to 'round funnel' perhaps, or maybe transitional and part way toward a bucket shape - and yes, possibly Continental.
Difficulties not a problem - it's just that 'pinpointing' is usually asking for a little too much precision
![Wink ;)](http://www.glassmessages.com/Smileys/classic/wink.gif)
- most of the time dating to within a couple of decades is about as near as you will get. Style, fashion etc. are driven by a variety of reasons and most of the categories into which drinking glasses fall - folded feet for example - overlap in terms of time lines, often by a wide margin, so not too difficult to make a mistake when dating on the basis of a single feature.
Sharp pontil scars exist durng the first 60 or so years of the C18, then tend to fall away, but - they exist not uncommonly on some glasses made in the C19, and 'smokey grey tinges' alone could be misleading.
Aside from the folded foot, this glass lacks other features to help with dating, so you may find it difficult to make further progress. As we've discussed, this was a common shape which no doubt lasted for some considerable time, and I'm still inclined to go for first quarter C19 - but am always ready to stand corrected.