What patterns are you looking for the dates of? What pattern books? Happy to try and help you find the pattern book or dates. :)
Simplicity 5444 seems very similar to the pattern on the left. This is from 1964.
I have really learned so much from this wiki in a short amount of time.
You'll want to search for a Keyhole style dress. Hope that helps you out.
This might be a good pattern, and instead of normal pockets, just make them heart shaped. https://www.etsy.com/listing/1655391014/romper-sewing-pattern-for-women-xs-xxxl?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=jumpsuit+sewing+pattern&ref=sr_gallery-1-17&pro=1&sts=1&dd=1&search_preloaded_img=1&organic_search_click=1
The patterns themselves in acid proof stick proof bags.