S o l D Norwegian or Dan enameled silver screws back earrings.

I believe this is from Denmark or Norway. it has a stamp stating the silver content, which is .830 (meaning 83% silver and 17% other metals). no other stamp. I think it's Norwegian because I have a necklace very similar from there. Anyways, this is in very good vintage condition, no chips or cracks, nor missing enamel. it has the screw back closure which isn't very comfortable nor secure in the earlobes, that's why I usually wear them as an earclimber. most of them look good and less of chance to loose it. I didn't measure these but they look like a little less than an inch. if anyone's interested, I'll take an accurate measurement.