Hi
Thanks very much for your comments on our webiste, I really appreciate the feedback! With regards to who made your lamps, they could be Barovier and Toso, one of the oldest firms in Venice as they regularly produced pieces in this style but due to its popularity, they may have been made by another firm. Check the bases for etched signatures and also look to see if the polished areas carry any types of scratches or wear as this is always a very accurate indication of the age of a piece. The more wear / scratches, the older the piece
Ciao
Dean