Mexican Silver Cross & Chain - old item from estate jewlery

Description

vintage Mexican Sterling Silver ?? Cross Pendant Necklace. I think it's stamped on that little piece that holds chain to cross - perhaps the number 3 as well as FVB TAXCO MEXICO ???
cross is 2.75" tall, 1.75" wide (at widest part), chain is just about 15" (but doubled up - so 30" ??)
I weighed it on my kitchen scale (26 grams), but not sure how accuate this is
code jsb 167
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