Identify Vintage Platinum & Diamond Ring Maker Mark - Uncas Mfg. Co.

Question
I'm getting ready to list a platinum and 2k diamond solitair ring on ebay.  The ring is old and I'm trying to find out what the makers mark means.  On the inside of the ring is an upper case U with a stylized arrow through the center of the U.  Any chance you can help or point me in the right direction?
Thanks,
G.

Answer
Hello Guyna and thank you for your inquiry. Your ring is by Uncas Mfg. Co. and you can find out more information at the below link: Just copy and paste it into your browser address field and hit enter !

http://www.illusionjewels.com/costumejewelrymarksu.html

Hope this helps ! Good Luck.