Has anyone found a solid 12k gold bracelet before?

Hi all I picked up this piece from a dealer who was unsure of it. It tests decently with 14k acid. Kee tester is between 14k and 10k. An xrf analyzer says it is 12k with some copper, zinc, and something else I forget.... however everyone I show it to says it is gold filled because it's 12k but no test has definitively shown that it is gold filled just that it is 12k gold. The weight feels right for solid gold being 23 grams. I see no signs of marks or metal wearing through. How unusual would it be to find a solid 12k bracelet?

Pictures won't upload but I'll get some up in a bit. It's just a nice curb link piece.

The gold on the xrf was alloyed with copper, zinc, silver, and nickel.

 

It happens. Black Hills gold was 12k at one point, and it was used elsewhere.

 

XRF would tell filled though, wouldn't it? I've seen XRF test slightly above, but more often below, a stamp. Maybe it was "14k" but not as advertized...

 

Here is an image of the piece in question. I scratched into a link with a knife (a link I'm going to need removed for it to fit me) and used a loupe and it appears gold in the cut... I don't know how deep I would need to go to get through gold fill.

 

Uncommon
Not unheard of