These are what is called the "Hallmark". All silver articles made in Britain have to have a Hallmark. It identifies where it was made and the year of making. It is a complicated system, there are books written about it. I'm sure you can get details from Google as well. Further answer: when you specified an "old sterling silver ring", I assumed it was British, but of course it might have come from elsewhere. Other countries have their own systems of hallmarking. A useful site is "www.925-1000.com" which gives details of the marks of many countries as well as Britain, so you should be able to find what you have on your ring.
CA likely stands for "sterling silver" which is a standard marking indicating that the ring is made of 92.5% pure silver. This marking is often accompanied by the number 925 to signify the purity of the silver content.
The number "82" on a silver ring might signify its purity, indicating 82.5% silver content, commonly known as sterling silver. Sterling silver jewelry contains 92.5% pure silver mixed with 7.5% of other metals. It's a standard mark denoting high-quality silver jewelry.
The marking "925" inside a silver ring indicates that it is made from sterling silver, which is 92.5% pure silver mixed with 7.5% of another metal, usually copper, for added strength and durability. It is a common hallmark used to signify the quality and authenticity of silver jewelry.
A "925" stamp on a gold ring indicates that the ring is made of sterling silver, not gold. Sterling silver is an alloy made of 92.5% pure silver.
STS on a ring typically stands for "Sterling Silver," indicating that the ring is made of genuine sterling silver. This stamp verifies the metal purity of the ring.
The stamp "KL 925" on a sterling silver ring indicates that the ring is made of 92.5% pure silver, which is the standard composition for sterling silver. The "KL" may refer to the manufacturer or jeweler who made the ring.
SR on a ring likely stands for "Sterling Silver," indicating that the ring is made from sterling silver. Sterling silver is a popular metal alloy consisting of 92.5% silver and 7.5% other metals, typically copper.
The numbers 925 indicate that the ring is made of sterling silver, which is 92.5% pure silver. The letters SAI are likely the maker's mark or initials of the jewelry designer.
"CI" stands for "Chrome Indicator," indicating that the metal is likely sterling silver. "925" signifies that the metal is 92.5% pure silver, which is the standard for sterling silver. This engraving confirms that the ring is made of sterling silver.
The stamp "925" on a silver ring indicates that the ring is made of sterling silver, which is composed of 92.5% pure silver and 7.5% of other metals for added strength and durability. This stamp is a common hallmark for silver jewelry to signify its purity level.
PAD 925 for a sterling silver ring describes the chemical makeup of the silver in the ring. Generally the number correlate to percentages of metal in the silver alloy.
Can a ruby be real in a sterling silver ring