Large Amber Sterling Ring - Unusual Marks.

[natNYC]

This is a huge smooth amber stone.
it is set in a sterling setting, with interesting floral accents, that look scandinavian.
on the back outside of the shank are three small hallmarks.
I've used a macro lens to capture them.

Any ideas? I can't figure out what they could be. Not marked sterling, 925 or anything other than that location.

[AG2012]

Hi,
Modern Polish mark (post 1986).
http://www.925-1000.com/Fpoland_marks_1.html

Letter ``G`` stands for Gdansk.
Regards

[AG2012]

Sterling (925 within the mark).

[natNYC]

Thank you so much!