"The marking ESPO or also found as ESPO-FLEX are the marks of Esposito Jewelry, Inc. a costume jewelry company located in Providence Rhode Island, USA. These marks were first used in 1951."
I cut and pasted the above answer from http://www.modernsilver.com/MYSTMARKS.html
espo was the company that made it. 925 means sterling silver.
Sterling stamped on any item is .925 silver and .075 other base metal.
if the number .925 is stamped on it also that means sterling silver if the number .999 is stamped on the ring that means it is pure silver if no numbers, i am not sure
The mark for sterling silver is 925 which indicates 92.5% silver content.
925 Argento is Italian for Sterling Silver. Most sterling silver pieces are stamped either 925 or sterling. Argento is Silver.
JSS stamped on a ring likely stands for "Sterling Silver" jewelry. Sterling Silver is an alloy containing 92.5% silver and 7.5% other metals, typically copper. This stamp indicates that the ring is made from genuine sterling silver.
10kt gold filled refers to a layer of gold that is at least 10 karats thick, bonded to a base metal, making it more durable and affordable than solid gold. Sterling espo likely refers to sterling silver, which is 92.5% pure silver, often used in jewelry. The term "espo" could be a brand or designer name associated with pieces made from these materials. Together, they indicate high-quality jewelry that combines the elegance of gold and silver.
Are you sure it is fspo? ESPO is the name of a vintage jewelry company. I see it on many gold filled rings.
"925" stamped on a ring refers to the purity of the metal, indicating that it is made of sterling silver. Sterling silver is 92.5% pure silver, with the remaining 7.5% typically being another metal, often copper, to provide strength and durability. So, "925" is a hallmark for sterling silver.
It means it is sterling silver made in Taxco, Mexico
925 is the stamp for sterling silver.
The sterling silver standard has a minimum millesimal fineness of 925