I have lots of these lovely hollow birds with holes in the base. Only one is signed....Jussis, Riihimaaki, all the others have labels. There is Haparanda Glasbruk, Taidelasi, Studio Lasi and the like.
Some of them are made in Sweden, and some in Finland.
Some of my Taidelasi birds are designed by Taikayon......but I have yet to find out who he is.
I only have one Oiva Toikka bird, and I could only afford that because it was broken.
As far as I know, Oiva Toikka birds do not have a hole in the base.....unless someone has a signed one that has!!
I don't recognise yours as Oiva Toikka, but that doesn't stop it being a very beautiful bird.