Would this be 1950s era?

Hi! I'm the newbie that posted the other day!

I tried my hand at this pattern:

And am quite pleased with the dress:

I cut it shorter cause the original pattern had it going to my ankles! Not a good look on me! But it's much bigger than I measured, so might list it on my etsy instead of wear it myself. I really like the wrap over pieces though, and they weren't that hard to do!

Would you put a date on this one for me though? The pattern doesn't have any other info than 'Designed in New York City, manufactured in Australia'... I think it's 50s, but could it be 1960s as well?

Anyways, as most of my sewing is about recycling this was made from a bedsheet! More photos on my blog!