Wide Rib - Dugan
Dugan's Wide Rib is another of those tricky-to-identify eight-rib vases. All the more so, as it is camouflaged in so many different configurations. The height can range from 4.5 to 13 inches; it is found flared widely, not flared at all, pinched in then flared out (often called a spittoon-shaped top), ribs straight, or ribs twisted anywhere from slightly all the way up to 360 degrees, with the twist to the right or the left. It was made from a four-part mould, with base diameters of 3 3/4 and 3 7/8 inches, and a 32-point star in its Dugan marie.

So, how can this vase be quickly identified? It is sometimes mis-identified as Spiralex. Counting eight ribs is easy, but counting 32 points on the star is a drag. Look for bulbous rib points around the top. Pick it up; this is a heavy vase, with a heavy base. The area around the top of the base is puffy, with the wide ribs just gradually emerging out of this puffiness.

Probably seventy-five per cent of these vases are peach opalescent. The remainder are purple or white. All the short, widely flared or spittoon-shaped vases are peach opal. The taller peach opal vases range between 9 and 13 inches tall. Purple examples, sometimes with spectacular iridescence, are usually around 10 or 11 inches tall. White generally around 12.

Dugan also made this vase in opalescent, non-iridized glass. These all seem to be the tall, twisted variations and as such were named Twisted Ribs by William Heacock in his Opalescent Glass from A to Z p.72. The carnival examples were appropriately named Wide Rib by Bill Edwards.