I found it! I have a ring I inherited from my great grandfather. I wanted to know a little more about it and came across your site here, but I found it! It is most certainly Rothman & Schneider from New York. Here's a link.
the mark looks like it will be a US mark. 14 K is a common gold standard in the US. There's also the possibility that the mark is not registered, not sure. You could try 'US Jewelry Marks 1922 edition'. There is link to these US maker's marks 1922 on Antique Jewelry Investor, in the Jewelry Resources.
You might also like to see the following 'R in Shield' thread:
