thanks Ian.
I'd overlooked Dodsworth's exhibition catalogue - and I'd certainly agree with Nigel when he suggests that this remains one of the most informative and useful sources regarding innovative and progressive designed glass from the 1920's and '30's. Dodsworth includes several pieces designed by Sutherland - although not a picture of your vase, I don't think.
That's not to say that design imagination ceased after the second war - there's some really great pieces from Luxton, Hammond and Irene Stevens etc. from the 1950's and '60's, but the output of such designers is as nothing compared to the shed loads of mundane and boring cut glass that was produced in the same period - perhaps it's these very ordinary pieces that people think of when they hear the words cut glass, and maybe it puts them off the subject.
Clear, cut glass, seems always to remain underrated, whatever the design - which is good for those who collect, but doesn't lift values in the same way that colourful studio material has risen. Having said that I hear that W/Fs doesn't now command the same prices it was achieving ten years ago.
It might be a lesson to us all that the most fashionable wares are those to be most cautious of......they rise, but then equally they can dip

So, best to stick to cut glass if you're in for the long haul

Sorry for rambling - and look forward to hearing of the height of your vase.