Luckily I found Posh Girl Vintage - browsing pretty vintage dresses makes me do happy sighs. Even if I am doing it while clad in my pyjamas, dressing gown and ridiculously cute white fluffy doggie slippers.
In my head this is what I'm wearing:

Probably with some appropriate heels, I suspect the fluffy doggie slippers won't match.
Look at the beading:

*happy sigh* Pretty.
Unfortunately the 1960's White Silk Silver Beads Tea Length Dress is sold, but there are plenty of other pretties on Post Girl Vintage.