g-23
It's gold 14k
It means 'back and front', an indication the item is plated (either gold or silver).
The "AK" is Turkish for "altın kaplama," which means "gold-plated" in Turkey. 14K gold is 14 karat gold. So the item with the mark "AK 14K" is 14K gold-plated.
9ct back and front: a term which is no longer legal, but is sometimes seen on old jewellery. It means the item is plated with 9ct gold on the back and front of the base metal.
The Maker's Mark
is AJ a gold mark
This means 10k gold.
What does 18kgmean
It's usually used for Goldrolled items, like Cross Pens, it means V20 = 1/20 of the weight of the item is in Gold.
It means that its only gold plated
14K that originates in Asia or Europe may have this mark. Sometimes it is side-by-side to the numbers 585, which means that the item is 58.5% gold. So, 14K - 58.5% gold; 58.5% = 14K
Usually letters like that inside of a ring are makers marks or initials of the people for whom the ring was made. If a mark is right next to a karat mark it could tell us something about the gold itself. A ring marked 10k EPN would mean 1ok gold electroplated to nickel base metal. That item is not real gold.
9ct back and front: a term which is no longer legal, but is sometimes seen on old jewellery. It means the item is plated with 9ct gold on the back and front of the base metal.