Whilst on placment with the museums service i have had the opportunity to view some amazing things. Recently i photographed a large number of 1950s pieces.
Here are a few of my favourite pieces.
A late 1950s Horrockses dress
A 1950s Frank Usher silk dress
A 1950s Rembrandt printed cotton sundress
Also i urge anyone interested in fashion history to take a look at the excellent on line resources provided by Hampshire Museum Service
Advantage In Vintage 
Do you still have the Rembrandt dress above? I've found an advert for that dress too. In the exact magazine I found your Horrockses dress in:http://pinterest.com/pin/433823376574778551/