Hi,
Mary is right on the 1960's dating. and I would date this to the early to mid part of the decade, say 1963 to 1967. The hat is not made in Austria, that is the source of the felt body which was imported to the USA to be made into the hat, and La Vienne is the type of finish on the felt itself, which is made of a blended fur such as rabbit or nutria, etc. The color is beautiful. I have owned a few hats with the "Doris" label, and seen quite a few more, but she is a rather obscure milliner, but a very good one. "Elegante" would designate the line she made for that season, or an upscale better hat with a higher price tag. The hat is a wonderful quality and the style is sort of Alpine hiker, which was very popular at that time for mature women.