Yeah, sort of Ford. Did Greifelt/Greifeldt of Suhl have a sidelock with similar pin configuration?? Merkel also comes to mind & I wonder if they had an outlet in Hamburg. There are a couple examples I've seen with the name Internationale Waffen Haumburg & one was give as a Merkel. So the concern sourced the whole of Suhl depending on their needs.

Kind Regards,

Raimey
rse