This Butterick pattern is undated but I am guessing it a late 1950s, early 1960s Misses Muu Muu.
Moulin Rouge, October 1954, image from my rescued slide series.
Perusing the listings on shopgoodwill.com is one of my favorite past times. I am attracted to the dolls, especially the gorked ones. Time has not stood them well. Here are some recent shopgoodwill.com inmates: