Nazi Enamel Ring
This small size ring is silvermarked 900 for content as well as a makers name “Veljekset Sundqvist”. Now Veljekset Sundqvist was a silversmith and jeweller in Finland who made a lot of enamel badges but I can’t be sure this is one of his. The enamel is a positive, the widespread faking of rings is a negative. I’ll call this okay for now with the full expectation this will turn out to be a fake.
Update: Definitely a reproduction, I found another one on the internet.