Several of these, including inkwells, have appeared over the past two or three years. There was an inkwell with this design on eBay recently (140294175542 - broken and probably with wrong stopper).
I have a weight of this design on mottled orange ground.
All the ones I have seen have had canes that tie in with early Vasart (Ysart Brothers) work. I have not yet seen any that have canes primarily of Paul Ysart usage.
I believe these were by Salvador. They all seem to be of fairly good quality although often have a few stray bubbles and sometimes a bit of wreathing in the dome. Base finishing varies and my example has a neatly ground pontil area, which is perhaps not so common for the Ysart Brothers period.