I’m looking for help in trying to identify this cap. I picked it up at a flea market in Germany some 30 years ago. The cap is navy blue. I have identifed the flag in the center of the wreath as that of the Free City of Danzig. Does anyone know what vessel the cap might be associated with? Or, have any suggestions on who I might turn to for information?
Thanks,
Tony

Attached Images

Danzig cap.jpg (258.2 KB)