10K yes it is gold. IBG= Ira B Goodman jewelry maker (makers mark)
The SDX trademark is filed in the category of Jewelry Products . The description provided to the USPTO for SDX is jewelry, namely rings and bracelets.
When you have a piece of 10k jewelry that has 'OTC' on it, it is the name of the company. OTC has been a leader in the fine jewelry industry for many years.
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NBK is the manufacturers branding on the jewelry. 10k is the quality of the gold.
416 is 10k
This means 10k gold.
The 10k of 10K THL means the metal is 10 karats. The THL is the trademark of Samuel Aaron, Inc., who is a jewelry designer.
HMS is a company that specializes in 18k, 14k, 10k and platinum jewelry
10K SUN refers to the amount of precious material used in the jewelry. It can refer to either gold or diamonds.
10k lyg 11 7.2 grms
If jewelry is marked 10k only, It means it's 10karet gold. If it say 10k ge or hge, it means it is gold plated.