Vintage 1920s-30s WMF Germany Etched Copper Vase, ? Albert Merkle design, 10"

Vintage Etched Copper Vase. I can't find markings but there is a lot of wear to the bottom by decades of cleaning. From multiple searches, I believe this to be WMF Company (WURTTEMBERGISCHE METALLWARENFABRIK) with exact shape matches on both Artnet and LiveAuctioneers history searches. Attribution to Ikora-Vase mit Blattdekor (designed by Albert Merkle) according to Google lens search. There are a few minor surface scratches and an area just below the shoulder on one side with what appears to be either glue/sticker/tape residue. I did not attempt to remove it as I don't know how the patina will take cleaning products and will leave cleaning that area to the buyer.