Feather Swirl, US Glass

In more than ten years this is the only example I've seen or heard of in the pattern. This short marigold vase sold at a 1993 auction for $60. There was minor damage.
Hard to believe the pattern is also known in a butter dish, but here one is--the first reported. It's in marigold and sold in 2012 for $100 with minor base nicks. Photo Courtesy of Seeck Auctions.