from screen pix alone it would be difficult to dispute this as being 'tango' glass - it looks to qualify in all the right areas - have a look at www.20thcenturyglass.com
- it gives information of interest. I've no idea, but with the current fashion for copying all things antique and vintage, are similar pieces still being made?
My only thought was that the shading of what appears to be yellow/orange, looks a little unusual for tango glass, but as I say I'm a bit thick in this area. Another point to mention is that most tango glass is cased.......... either with crystal (clear) or with another colour. I suspect this piece would be cased in clear - is it?? It's useful to provide details of dimensions too - the height would be adequate - it can sometimes help, although in this instance - assuming the vase is period - then it will have probably been made somewhere between the two wars.
Just realized that having spent some years owning Ruth A. Forsythe's book, nowhere does the lady use the word 'tango' - perhaps it's a post 1982 term. This is probably an art deco design - whether it's old or recent.
Regret to say Amanda that almost certainly you will never know the maker - too many small glass houses making such wares - and the vast majority of backstamps that can be found on these pieces will almost certainly just say 'Made in Czechoslovakia'.