Amelung produced some of the finest glassware this country ever made.A trait in Amelungs work on fine tableware I have noticed and I have not seen it elsewhere is a flat cylinder shaped foot with a hollow flat cone shaped support which rests on the foot and looks like an upside down bowl.Here it is on an early glass candle stick attributed to Amelung.This piece sold for 20,000 dollars at auction in 2005.
I have a couple of early vases with the same foot and support system.I originaly thought both of them to be early South Jersey but have since changed my mind and I am now leaning towards Amelung as the manufacturer.Here is a bulbulous vase with plenty of dirt and potstones in it indicative of it was an end of day product.