EUREKA>>>>I've got it.
It is August Walther's "Oliven" - 1931. Number in the catalog - 20817.
Another Carnival Glass mystery solved. And it all happened here over the past couple of hours! Anyone with the "Cut Ovals" butter dish shown in their Edwards & Carwile books, please amend the maker to WALTHER.
Della, may I post your photo of the butter dish on my website "Walther" feature, as this piece needs to be recorded? I will, of course, acknowledge and credit you fully.
The colour, by the way, is just marigold. Pastel marigold is one of the DDG marigolds, as is Pumpkin. Both are very rarely found. Pastel marigold is full of lime, fuschia, purple, aqua and gold, as you twist and turn the iridescence. Most marigold falls in the mid range category.