Looks like the gentleman from Boom, Paul Heller, doesn't it?
Typified by the cluster of horizontal rims, the rather tacky painting (sorry, Frank), and the basic shape as well as the gilded rim.
Does not show the typical feature of a wavy rim, but you can't have everything!
Didn't find this particular 'pattern' in the book, but that's not surprising.
My guess it's either from Boom, or from a small studio up the river at Laken.