I track yellow vaseline glass daily for the past 14 years, and I have never seen any yellow vaseline glass coming out of China. I have only come across two pieces of green uranium glass and one yellow piece that have come out of Japan. I know that there was/is a very limited amount being made in Japan, but it mostly has been snapped up by the Locals in Japan before it ever makes it to other locations. The yellow piece from Japan was a leaf-shaped ashtray, that came in a four piece harlequin set, like for a bridge game set. The color is very similar to Cambridge's 'pistachio' yellow. It took me several years before I saw two sets, both with original paper labels (but I digress). Your piece is most likely Italian, 1960s or 1970s.
(aka Mr. Vaseline Glass)