Made by world gold and diamonds jewelry manf.
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.
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.
When jewelry has 10KCAL stamped on it, the 10K means that the jewelry is 10 karat. The CAL is a mark that shows the company that made the piece.
I don't know about the J, but the S.A.L. could be one of the early Swarovski signatures.
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.
The stamp CID on a piece of jewelry indicates that it was made by Clyde Duneier, Inc., a jewelry maker based in New York.
PSCO is the hallmark of the Plainville Stock Company, making jewelry pieces since the late 1800s. If it's marked 10K, it's that purity of real gold. You may have a valuable vintage piece of "costume" jewelry depending on its style and condition.
The stamp CID on a piece of jewelry indicates that it was made by Clyde Duneier, Inc., a jewelry maker based in New York.
CR on a 10K ring indicates that the ring is made of 10 karat gold, which means it is 41.7% pure gold. The remaining 58.3% is made up of other metals such as copper, silver, or zinc to strengthen the gold.
24k is pure gold, 18k is 75% pure gold, 14k is 58.5% pure, and 10k is 41.7% pure
10K yes it is gold. IBG= Ira B Goodman jewelry maker (makers mark)
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