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I'm sorry for my late reply Joanne. I agree with the general consensus and think 40s/50s. I am sure there are 80s dresses with stays but I've only seen them in dresses that were from the 60s and earlier.

That 2 piece dress also has mid-century characteristics, ie; the intricately detailed collar combined with the shoulder pads, side zipper with snap, hook and eye closures, as well as the length of the skirt.
I wish the seller would have said whether the zipper was metal. That always helps when determining age.

I also notice both being crochet ribbon designs. I wonder if that was a Marina, California specialty or if it was just chance that yours is like that and so was the one that you found.

Both beautiful.

 

Spectacular skirt MJ! I didn’t realize it was used in clothing: How would you recommend washing?

 

I've had 50s hats made out of that same ribbon material.

 

So very pretty!

 

As a knitter... you could tell a bit more about the piece turning it inside out and looking at the finishing on it. The seam binding has been a pretty classic seam finishing for a knitter to use. I've seen garments made of ribbon 'yarns' for a long time. Every so often there's a revival of interest. Like 1985 you were seeing it everywhere! But I had a 1950s suit in the shop for a while that was ribbon yarn. It's a classic that comes in and out of vogue I guess is what I'm saying.

This dress though, its style, and the label, look more 1970s.

 

Me too -- It reminds me of a pink ribbon crocheted 50s dress set I have somewhere, with the same/similar crochet stitch used on those midcentury Hawaiian tourist raffia skirts.