Ok What I think that it means is 14KT = 14karat GF=gold filled and ESPO is the maker.
Sometimes when marking the piece the letters don't always line up exactly the way that they should.
This is my best guess.
14k is the purity of the gold. CKG is the manufacturer of the ring
That is the company or maker. Your ring is gold with the 14k on it.
14k is 14k in gold, f6 is the band size
The symbols S51 on a 14k white gold ring illustrate the purity of the gold.
No
EM on ring
Gold
cTo is probably the designer/jeweler of the ring 14k is what it is
14K is the content of gold in the item, and SD is most likely the initials of the ring's maker.
What does zet mean on a ring
For real
This would be a Sterling silver ring that is 14 k gold