To clarify a point, the seller indicated he'd not want it back if it was sent for expertise and deemed a fake because - here it comes - he'd not know for sure if he might then be getting a very good fake back. Which (circular logic, I know) implies he doesn't really know if he's selling a fake or not now either. I do not know for sure (of course) if it's a fake, all I'm doing is passing on this one. As mentioned, happy to help anybody else get this one and I'm getting the research (if possible) anyway so hopefully we can read more on this later.