It stands for Charles Lyster and sons
As I understand, it is actually two parts; The 1st part, GE (Gold Electroplated) and the 2nd, ESPO (The Maker/Manufacturer) ESPO manufactured this jewelry in the U.S. during the 60's and 70's, Now Making this Specific type of Retro jewelry somewhat valuable.
If your ring is old, the mark may be WWW. That would be the mark of White, Wile, and Warner of Buffalo New York. They were making quality jewelry in the early 1900's.
S-Cl
S-80 means plated.
The abbreviation cL means centiliters/centilitres. One L (liter/litre) contains 100 cL (centiliters/centilitres)
Your transmission is out
it means certified jewelry.. by the gold council..its safe to buy it.
Made in china:)
S-80 means plated.
Maz is a jewelry designer from the 70's and 80's...you can find some of his things currently for sale on ebay..
Ring and jewelry manufacturers are required by law to stamp their jewelry with a purity symbol such as "14K" or "PLT". However, some also include an additional stamp or engraving to mark a designers name, collection type, or even a short message describing the piece. This extra message is not required or regulated by law and there are a plethora of marks or engravings a jewelry item can have in it. While we can't be sure unless we examine the piece, "SD" sometimes means "synthetic diamond(s)". If one is sure that the diamonds (if any) in the jewelry or ring are real "SD" could very well stand for a designers name or collection type.
Cl -- S -- Cl ....... .......O Cl -- S -- Cl ....... .......O for some reason wiki is erasing the white spaces needed to format the bonds. ignore the periods as they are space holders. there is a double bond between the O and the S.