Bhj
platinum gold palladium and silver
4 karrot gold
bhj
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Could be 2.5 carat total weight diamonds.
http://www.trademarkia.com/esx-74196079.html
It means 14K PBD Peter Brams designs
If it is a vintage ring, it may be from the Traub company that made engagements rings circa 1925 and marked their rings with a TT.
bhj
SECO was the trademark of Stein and Ellbogen, a jewelry wholesaler.
i have the same 18 marked 750 gold ring