They look mid to late 1960's. At this time the toe shape is moving from an extreme point c.1960 toward a wide square by 1970.
I can't think of any earlier footwear that uses a fine nylon mesh - strings for straps yes, but not mesh fabric. The metallic threads used for the embroidery looks like a plastic foil too, rather than a metal wrapped thread you might find on earlier footwear.
The heel looks like hollow plastic, which you won't find on 1940's footwear.
Also, I think I can see words next to the manufacturer's stamps - if this is the material content you are definetly looking at late 1960's at the earliest.
It's worth mentioning a very similar style of shoe involving mesh uppers and a similar shape came back into fashion in the 80's/90's, but the later examples I've found didn't have the internal toe cap. Also by that point the inner sole lining tends to be a thin PVC rather than the paper based insole I can see yours is by the crease.