Vintage NOS 1940s 16 mm Edmond Kehrer (EK) Gold-Plated Buckle

I have a few NOS Edmond Kehrer gold-plated buckles from the 1940s for sale. This distinctive design was patented in 1939 and was used by various watch brands, including Omega, sometimes also in branded versions.
The buckles measures 16mm in width and are marked EK-Pat and plaque or. Over the years, the gold has developed patina, giving a beautiful warm almost rose-gold hue.

Price: 70€ per buckle + shipping. I'm based in Austria

This is the Swiss patent document from 1939 with drawings of the design.