I am particularly fond of these full-arabic Connie dials and hope to have one, one day - Unfortunately, I've just never found one in a watch I wanted to buy.
Interesting that you both have the 'flat, cut-out' style arabic dials rather than the faceted numerals version.
How did you have this dial lying around
@robocaspar ?
They're not exactly common or garden variations.
I don't think there is anything wrong with transplanting a Connie dial into a Connie case for your own enjoyment - it would be technically correct but not original (to that particular watch) so it would only be right to declare it as such if it were ever to be sold.