I recently bought this weight (not my normal taste, but it is a long story):http://glassgallery.yobunny.org.uk/displayimage.php?pos=-6284
It is about 9cm/3,5inches across, and about 2 cm high. Flat top, with a butterfly impressed on the bottom. The butterfly has been finished in acid (I think) to give it a bit of shading with certain areas blocked off to allow for the clear wing marks. The side has small grooves all around. Although the add made no reference to a mark or signature I found the following on the side and towards the top:http://glassgallery.yobunny.org.uk/displayimage.php?pos=-6283
(Sorry thats as good as I could get the pic)
If the tail of the butterfly is 6 o'oclock this runs from 3:30 to 5:30. having tried to decipher I have come up with "Ales917.1.ccreycneecery"
The first part could also be "AL1991.7.1. "etc
I have not been able to trace anything similar or figure the signature so could somebody please point me in the right direction. (I hesitate to say this but something says Scandinavian to me....but looking back at previous posts this has become a fall back position on some bad calls for me
Kind regards and all the best over easter.