Almost certainly Italian, in a technique known as "Terzo Fuoco" - because it has to be fired three times: once for annealing the glass, once for fixing the gilding and once for the enameling. It requires very careful control of the oven temperature. I said "almost" because there are a number of manufacturers in Bohemia who use the same technique and your picture is a little out of focus.
To get a better picture, check the minimum focal distance of your camera (probably 3 ft/ 1 meter). If you zoom in, use a tripod. More light :idea: helps to reduce shutter opening. Best results are obtained outside.