I would think the fabric is less important than the shape of the shoe. The Cuban heel and overall shape of the shoe looks 40s to early 50s to me. My mother had the same type of silver mesh dance shoes, she kept the receipt too and hers were Christmas, 1938! I know the silver Lurex mesh was used in the late 30s already.
I would have to disagree there, as like most things in fashion, the same shapes come around again and again over the years, but the materials and construction tend to evolve and develop. It is true you can find this shape of sandal in the 1930s, but I still bought this same style of sandals around 2012. Your 1930s sandals are likely to be all leather apart from the mesh. These are leather soled, with man made uppers. My modern sandals are leather uppers with man made soles.
I'd also like to mention the buckle on these shoes is a streamlined rectangular buckle with a roller tube. Most sandals I've handled from the 40's and 50's have figure of 8 buckles without the roller tube.
The size and manufacturer's markings are stamped, not hand written. There is no set date when this habit changed, it varies by company, but it does indicate later rather than earlier for me.
Lastly the chunkier heel is likely to be due to the shoe size - 10 N - if I'm reading it correctly. As an evening/possible dance shoe as Jonathan mentions, most tall ladies do not want to tower over their partners and as such the larger shoes for this purpose tend to have lower thicker heels. I have several pairs of my own that do not strictly follow the fashion of their era for this necessity.
I do have this pair of sandals from the early to mid 60's, and they share similar features, such as the buckle style, stamped markings, strap construction (folded back and sewn, rather than sandwiched under the lining as earlier examples have been).
The differences in their design can be explained by the markets they were produced for (american verses european) and the customer demographic. The gold sandals still have the stiletto heel from the height of its fame in 1960, but show a square toe which was the new fashion heading towards it's height in 1970. They are the trendier version if you like, of the style above.
