Picked this up at a car boot yesterday, sadly has a bruise of about 12mm diameter and a couple of small ones.
At the risk of being mistaken (again) it seems Ysart/Vasart to me, although I have spent some hours searching for one comparible without success. It is 80mm diameter by 55mm tall. ( 3 1/4 x 2 1/4 inches0. It has a rough snapped pontil mark that has not been ground down and actually stands proud of the base so that it rocks on it. The rest of the base is flat. It has a large 8-10mm centre bubble with 6 equally spaced smaller bubbles 4-6mm.
(If not as above then Bohemian?)
Any help with ID/age gratefully received.