I'm going to go with late '50s - it looks like it's great quality and I, too, really like your model/you - and the cute shoes!
Ladies, be glad you're in winter. Here we're having a heatwave - the hottest in a hundred years. Today it's 43 degrees (that's 109 for those of you who use fahrenheit) and it won't getting any cooler all week. Thank god for petticoats, is all I can say.
Nicole