Hi!

I am new to the forum here. I hope you can help me.
I have been researching and simply cannot locate this mark anywhere.
It is an Art Nouveau Enamel and Sterling necklace. (see photos)
The mark is R & SO or R & SD plus the word ‘Sterling’.
Can anyone help me?
Pretty please?

I’d be so grateful!

Susan

[IMG]http://i61.tinypic.com/scdkzb.jpg[/IMG]
[IMG]http://i60.tinypic.com/sepnpw.jpg[/IMG]
[IMG]http://i59.tinypic.com/bjdd95.jpg[/IMG]