That would be plumb gold, also expressed as 14kp. It is a mark indicating exactly 14 karats of gold, no less, no more. A mark of quality.
"Plumb" or true 14K gold
CZ stands for the company that made the ring. A "CZ" can also be cubic zircon that is a man made gem/diamond.
It probably means plated with 14 karat gold.
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Andel Jewelry Corp
Nickle plated
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