These are very cool indeed and I don't recall ever seeing postcards like these before.
According to this Ephemera site, the earliest these Kodak photo postcards would date to is around the 1950's based on the wording and configuration of the back.
https://www.doaks.org/research/libra...-kodak-company
Maybe these were custom made? If so, they were very well done.
I'm soooo tempted.....