Help dating strapless satin front closure Life Formfit Bra

Hi all -
I've researched ads and cannot seem to place the era of this vintage Life Formfit bra I have.
It feels like satin on the outside but there's stretch - elastic lined in satin?
There's double bands of boning that runs down the center bust with mesh lined net insets and this section has softer lining at the ends.
6 front eye/hook closures.

Any ideas? It doesn't look like any of the 1950s ads I've come across and I'm inclined to think it's older than that - more like 1930s but I'm a bit out of my element here.

Thanks for any input!
Brooke