The base colour looks like the slightly later deeper "jewell-like" shade Mark describes. Variations on the normal shape of pulled ear vases are known. I have a vase with a wide neck and have seen them on other shapes too.
I'd suspect it's not a true "button" rim, which were more the outcome of not knowing how to do rims properly, so pre-Boffo, but just a thicker than normal one. Probably from during the time Vicente Boffo was still there.