That’s intresting . Just been offered a similar lady’s one and have been trying to find some info about it
I think I may have seen that watch on Ebay. Or one exactly like it. I'd considered biding on it till I saw the stem was missing.
According to the seller it was sourced from the first owner as an estate find so according to me this one has not seen ebay.
I don't know how well versed you are in regards to Certinas (sorry if I missed some of your posts on the subject ), but make sure that the bracelet you go for isn't too worn. They have the potential for massive stretch!
When is your new addition from? Two of my bracelets are matching their watch and the oldest is stamped 4/59..!