The Item is Gold Filled (also called gold overlay).
The 1/20 12k would mean that 1/20th of its total weight is 12 karat gold.
I would guess that it's plated to 20 microns with 12 karat gold.
Im not exactly sure.O.o..but some teens tend to say 12K as in 12,000. Sometimes referring to money, and sometimes for others.
It means the dress pin can hold a stress factor of 1.20 of 12 kilograms, which is .0001 kilograms...A total guess, since my quota of number questions is actually used up ( it is one). But I LOL
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