so what happened to my first opinion

When you think of the social history of drinking glasses, and the personal ownership stories attached to so many of these pieces, they represent an endearing area to collect, and as Peter is always telling us - they can be used.

Genuinely datable glasses - pre 1820 - are perhaps getting scarce, but there are still a lot of lesser lights out there, and can only assume that lack of interest stems much from difficulty with accurate dating, and fear of ending up with a copy. Deciding whether something is 1810, or an 1910 copy, might be an off-putting reason, and then again there are a lot of folk who will only collect bang to rights pieces with gilt edged datability because they need to know what it is they've just spent £250, or more, on. Perhaps folk should be more adventurous with their purchases, and less worried about exactness

This is an intriguing piece - it has all the appearance of a rummer, but seems to fall below the miniumum size of such a glass. It has a tavern/pub appearance, and lacks any dull bowl to indicate hot toddy use, and pound to a penny that you won't get any further with it's history, unfortunately. I don't collect Continental pieces intended for similar use, so no idea if middle Europe made similar shaped glasses in the C19 - would assume so but assumptions are dangerous things.