Hi Andy et al.
I am 99% certain that it is St MandÃ© or Grenelle. It was sold recently at one of my local auction houses as part of a mixed lot with other paperweights, (where I was outbid...) before it appeared on eBay. I thought both sale prices were 'quite strong', but as I (er hmm...) have two near identical pieces in my cabinet, I am not that unhappy.
What worried me about it was that it had several bruises, and the stave basket was very close to the surface (as usual in these pieces) - so good restoration may not be possible. It had rather dirty clear glass (striations and debris) - not unusual - and the glass was rather grey - fairly typical. It is mainly the glass quality that makes me think it is St M or Grenelle rather than Clichy. It is hard to distinguish these two factories, in part because the founder of Grenelle (Charles Bredgen) started his career at St MandÃ©. He then went to Finland, before returning to work at Clichy (just to complicate things further!).