hi everyone,
a little update.
I was not able to find a whole lot of information out about this dress - I found two dresses which sold over a year ago with the same print, but very different styles (one was a pake muu type dress, the other was a short-sleeve button up dress.) I am thinking 1956, and no later than 1959 in terms of dating. I was never able to get a response from Camille Shaheen, unfortunately, but the Shaheen website leads me to believe it's 1956.
I re-shot the dress, and tried the belt in the front - it did not look right. The underside of the belt is just that, an underside, and it looks strange buckled in front. The buckle ends up looking upside down when bucked in front.
So I have finally decided to put it up for sale tomorrow! I'm nervous, but excited. I hope it will find a wonderful new home. Thanks for all your help!!!