Hi John
The experts don't like being called experts, even if they are, as on the one hand it sounds like a challenge and on the other, the deeper a researcher delves into a subject the more she is aware of the vastness of the unknown.
No-one here specializes in Finnish glass as far as I know but maybe TMaritta, as a native, may have an angle and Bill Geary's knowledge of Scandinavian glass in general is almost encyclopaedic, having been invoved with it for so much of his working life.
Me ? I'm very much a learner, frequently needing new boots ! You ask no specific questions but I'll tell you what I think I know, which ain't much.
Armando Jacobino was an Italian master glassbower who emigrated to Finland in the 50's to become the master glassblower at Nuutajarvi Notsjo where he worked with Hopea and Franck to perfect the Ariel technique. After working at Nuutajarvi for nearly a decade, he went to work for Kumela from 1959 until his death in 1970.
He seems to be best known for his modernist figures, particularly of cats and birds !! Various signed pieces have cropped up here a few times in the past couple of years - use "search" to find them. I suspect they are more numerous in Scandinavia and possibly the USA.
Of molded Kumela items, instances of them turning up with Riihimaki labels have been noted. This is more likely to have happened with Kaj Blomqvist's work. Some Blomqvist designs are very well recognised. He worked at Kumela 1968-1976. Which company did he move on to ?
Kumela was taken over by Humppila in 1976. There's quite a lengthy bio of the company in Pina Smoke & Ice p176. Jacobino's use of opaque glass is also mentioned.
Your pic links do not work. Here are the correct ones
http://glassgallery.yobunny.org.uk/displayimage.php?pos=-1468http://glassgallery.yobunny.org.uk/displayimage.php?pos=-1469