VINTAGE ~ HAND BLOWN GLASS VASE OR POSSIBLY OIL LAMP?

WHAT A FIND! CUT GLASS LINES FROM TOP TO BOTTOM AS THE GLASS WAS SPUN. A REAL STATEMENT PIECE. IT REMINDS ME OF A LARGE TULIP BULB CATCHING THE LIGHT OF DAY. IT IS VERY SIMILAR TO THE MODERN Z-GALLERIE PIECES. IT IS MY UNDERSTANDING THAT EVERY PIECE MADE WAS UNIQUE, SO EACH HAS ITS UNIQUE MARKERS FROM THE MAKER. DEFINITELY ASYMMETRICAL. THERE ARE NO CRACKS OR CHIPS. HOWEVER THERE IS A SMALL NICK ON THE GLASS SHOWN IN ONE PICTURE.