Elks, Dugan
There are only a few of these nappies known, thought to have been prototypes but never produced in quantity. The one at left sold in 1995 for $7,000 and is the only one known in this shape. It sold again in 2018 for $10,000.
This ruffled version brought $7,500 in 2014 while another had brought $6,500 in 2007.

In 2019, an example listed as purple and having 8 ruffles, from the Judy Maxwell collection, sold for $8,000.

Updated 7/8/2019