Ooohhh it is *very* green isn't it Pip. Thanks for the pic, that's super.
Alice, I'm not sure it is at the moment, but thanks for the thought.
I'd not considered the base shape as an identifier but it could well be. We've seen cog shaped bases from France as well but mainly in those peachy pink liqueur and fruit sets. This is one that's really bugging me now - I want to know where these came from.