Dave,
Thanks for posting the image, can you get a better shot of the front please?
This one worries me as the pin keeper is the type used on fakes. So far I have not seen one used on a pre 1945 badge. This could prove my theory that these have been faked as well
The reverse matches well the known Frank & Reif shown below. Sorry for the poor images but they aren't mine & the badge was sold before I got to it
Cheers
Don