Love the image of the boneyard! I've a few thrown out there already dont worry I'm not about to add this to the pile...
The mark is partial which is'nt surprising given it's on a curved surface but what is there conforms with those I have and those shown online,
(it's the one shown No.4 page 341 in 'Italain Glass' Ricke, Schmitt) but maybe they're all fake? and there lies the interesting question that Alex raised.
I also posted this Venini marked paperweight..
http://www.glassmessages.com/index.php/topic,19258.0.html ....I cant find a similar PW of that period (46-66) and it appears noone else on the board immeadiatly recognises it, so following the cautionary principal should I assume it's another fake? I dont believe so.
When buying I agree it's nearly always sensible to play on the safe side, few of us have money to throw away and there are of plenty fakes in all areas of collecting, but when judging a pieces authenticity I believe we must start from a neutral standpoint. This is in no way a criticism of Alex who gave some sound reasons for his opinion based on experience, but did appear to be saying to some extent that since the fakes outnumber the genuine pieces and this piece does'nt look familiar (seem to fit the expected norm) then it follows that it's a fake.
I recieved an email this morning about a piece of pottery I have listed on ebay saying I had misattributed it. They were 100% confident in their view that it was by another (lesser) potter, so much so that for a while I thought they must be right and rushed to recheck the mark and even started to feel a little stupid at having made the mistake. They were wrong! Honestly wrong, as both potters marks and styles are very similar from a small photo I can see how they came to thier conclusion, but in the absence of good reference given their unwaivering confidence it would have been very easy for me to simply take their word for it.
I've emailed Venini before about another piece and like you Laura got a very nice reply confirming that one was a Bianconi design, but when I looked on thier site before posting this I could'nt find the same contact link (only one for potential dealers)...I'll have another look, and certainly post any reply.
Thank you all for your thoughtful input.