Pendant - Silver and Mystery Stone - Norway?

[natNYC]

I can't make out this mark.
830S - but the "T" on the side is curious.
The piece measures 2 inches long.

any info or leads, greatly appreciated.

thank you

[Elsebe]

N.M.Thune in Oslo, Norway. Take a look at the Norway Silver Marker's Marks, and you will find excactly the one you are looking for.

[dognose]

See: http://www.925-1000.com/no_thune.html

Trev.

[natNYC]

Thank you so much!