I think your bangles were made after 1980 and probably aren't from Taxco. They are beautiful and look well made, but there's nothing at all in the mark that indicates Taxco as origin, or that the mark is older. The design and sharp lettering and use of "925" in the mark, appear contemporary compared to early Mexican silver marks.
From 1948 until 1980, the official assay mark was a "spread eagle" - with head turned to one side and wings spread. At the center of the mark was a number that identified the maker. The eagle head at the center of "Hecho en Mexico" of the photographed mark, is not an official assay mark. I don't think it could identify the maker either. It looks more like a generic eagle's head symbol that's used iconically to represent products made in Mexico.
By 1980, the spread eagle was replaced by a letter/number marking system. The letters generally identified the city of origin and an initial of the maker's name. This system may still be in use, but over the past few decades, sterling silver jewelry from Mexico is commonly marked with the basic required information - origin and fineness, i.e., "Hecho en Mexico 925" - like the marks on the bangles.
Beautiful handmade sterling silver bangles from Mexico are very popular whether from Taxco or another city. Best of luck with yours!
