Vintage Taxco Mexico Sterling Silver Abalone Large Butterfly Brooch

Beautiful Arts & Crafts period vintage sterling silver & abalone butterfly brooch made in Taxco, Mexico.  Interesting excellent shape with no damage of note.  Has a security locking pin clasp in excellent shape as well.  Hallmarked on the back 925 Mexico and makers mark, they are stamped on top of one another obscuring the name.  Measures 47mm by 55mm.