I didn't see any of the Antonio Pineda marks that looked the same. However if there's someone out there who's seen a similar Antonio Pineda mark I would love to know.
My searches online didn't turn up any info on this mark so I figured I'd check here. Mark is "AP" surrounded by "sterling 925 mexico" and a separate Mexico stamp. What's also odd is I just found this one but the design is almost exactly the same as an unmarked thin band (unknown ...