Forgot to mention, there's another mark on the ring, but I can't recognize anything in it... I think the maker's mark shows an "S", some kind of bird and maybe a "C". On http://www.silvercollection.it/frenchsilversmithsS.html
I found "S.et.Cie. un canard debout 1898 Souchet (& Cie) " (without picture) where 'canard debout' means standing duck. Could that be the maker I'm looking for?