I have hats from her from the 1950s to maybe the early 1970s. I think her hey-day was the late 1950s to early-mid 1960s. I cannot tell you too much about her personally, just because I never got around to doing any research on her as yet. But I can say I have always been impressed with her earlier work, and find that her hats up till the mid 60s were always made of very good quality materials, with lots of hand detailing and excellent workmanship. Her label was considered on par with Mr. John, Dache' and other contemporaries. I find her hats to be nicer than most of Mr. John's work. She often copied styles from Paris and even did lines of hip, cutting edge, space age style hats. She could often be very trendy, as well as doing styles for the more conservative woman. Her hats in the 1960s were pricey and sold at the best stores.
I personally think the label is a mark of quality, that is about all I know just from handling about 100 or more hats with her label over the years. However the quality of her label hats declined after the 1960's, as it did with the majority of hat makers, even the very top of the line hats from the best milliners could not match their earlier work. Lots of reasons for that, but that is another topic.
I would also date your lovely hat to the 1970s.
