Chris,, Your info is correct.. We've discussed this many times in the old days here.
,,and even with all there rules/regulations It didn't work in 3rd reich Germany. Companies stole ideas from each other all the time...

Certain marks there is no discussion or debate about.. There was a time years ago Ges.Gesh. on a ring and it meant the ring was an immediate fake.. But that has been proved wrong..
German reunification,,freedom of information acts etc. etc. gave us plenty of information to go thru..

So,,this is possible,,,but one step at a time.. Let you get the ring, give it a wipe down,,and make some REALLY good photos...