when you have as many books as I do, it would be embarrassing if I couldn't have at least a stab at origin - it may seem clever, but I did only say 'an off-the-wall punt' - and in truth I'm really not sure. There are lots of genuinely clever people here who will know more about this sort of glass.
As I've already commented, decorative effects such as staining and flashing were possibly more eastern European features than U.K. practices, and it's possible that more glass of this type, with surface colouring, has come from the area we call Czechoslovakia/Bohemia than elsewhere.
As to date, I've no idea other than to suggest something like the middle third of the C20. Dating, other than taking jp out for a drink, relies of a variety of factors.........wear, style or shape, colour, dirt particles within the glass, type of cutting, lead glass or not and whether there is a pontil scar/depression.
Try spending a little time looking back at the GMB archives and you'll get an idea of how certain countries/producers can be recognized, often, by the characteristics of their glass. The Miller's guides for glass are usually quiet cheap, and they'll give you a good idea of the diversity of glass, yet at the same time show the similarities within countries.
Better quality glass designs are on record - lesser sorts are not, usually.
I may not have made myself clear re the wear within the neck of your piece. It's not the sharpness of where the neck meets the rim - rather the surface within the neck itself - dull and worn if there's been a stopper.
Unfortunately, many requests for id and dating lack the essential data that would help - those factors I mention above.
Where did you find your piece, and what is the extend of wear (on base)??