The very mirrory dark lustre is one I think is quite distinctive, but who, why, what or when has escaped the collander of my brain.
I remember seeing a rather lovely studio-style handkie vase in a local antiquey place, made a mental note of it as it wasn't too expensive, found out what it was and went back for it, but it had gone. As has my memory for what it was.
So all I can really add is that it is desirable and very likely something quite good.
