This gold plated Luger appears in a BBC News video clip of the FBI gun collection in Quantico, VA. I could not find a direct link to the video but a link to the news story on exhuming the remains of John Dillinger is here:
https://www.bbc.com/news/world-us-canada-49946501
Did this gun belong to a notorious criminal? My impression would be someone with a gold tooth wearing a long, shaggy fur coat and a big, wide brimmed hat.
KFS