I wouldn't have immediately pegged that vase as Riihimaen. It looks a bit brownish, and the base casing looks slightly wonky. It could be the photograph though? :? The shape is good though, although I haven't seen it before.
Have you reached the end of your stuff yet Tiger? Where do you put it all?? :shock: 
Hold on while I move this vase out of the way...
... that's better.
I'm putting it all on an Antique stall this Sunday, wish me luck.

The first vase is as thick as the rest and it gets a bit thicker towards the base but not as much as the other ones. It's not cased but it does have that orange fault on the rim that I sometimes see in ruby glass.
Yes, the second one has a slightly wonkey base casing. I will compare the colours tommorow as I need some sleep now.
I will also compare the third one with my amethyst Caithness vase.