Sterling.
The brand CTO doesn't really affect the value; it stands for O.C. Tanner Company. Your value is going to be based on the gold value
cTo is probably the designer/jeweler of the ring 14k is what it is
Sterling
what would it say inside a ring if it were gold plated
plated sterling silver
sterlized
(cto) *jewelry trademark used by o.C. Tanner jewelry co., salt lake city, ut for fraternal jewelry since 1940
what does thailand mean stamped in a ring
Your ring is real no matter what is stamped on it.
L stamped inside a ring
The letters RSG stamped on a ring means that the ring was preassembled. Any gems in the ring that is stamped RSG have not been certified.