This thread has been drawn to my attention. I did look at it when it was posted, but, as happens from time to time, the picture comes out stylised and I am not able to be sure what the item is!!
To be honest my thoughts at the time were that it could well be S&W/RB, since it is a form that they are known to have produced (see 'Rainbow Ware' pieces), BUT without a better image that opinion is a long shot. Any chance of new images, including the base?