These curious pieces of glass fruit occasionally show up at Carnival Auctions. This one sold in 2021 for $375. In marigold, it was listed as 7 inches long and had the words "patent applied for" embossed on it.
Photo courtesy of Burns auctions.

A similar piece had sold in 2012 for $350 and another in 2015 for $520.

Updated 5/1/2021