I couldn't resist. I bought the bag for €10. Actually only because of the interesting clasp.
The seller told me the following about the story:
"Comes from a family member, so first hand, who likes Grace Kelly and Jackie Kennedy. A French woman from northern France who is a teacher and did her traineeship in Strasbourg in the 1960s. She later emigrated to Germany for love.
In the 60s, bags were predominantly box-shaped and square. Increasingly, designers discovered different metals for their bag designs - unusual embossing and unusual fastenings or plastic handles were particularly popular."
So if any of you see me with this ladies handbag, know that my Grenadier is nearby and I'm looking out for him and guarding him.