1960s Taxco Mexico sterling silver 925 and abalone shell pendant / brooch

Vintage 1960s Taxco Mexico sterling silver 925 and abalone shell pendant / brooch. This versatile piece can be worn as a brooch with its secure rollover pin or as a pendant with its hidden bale. Excellent vintage condition. Hallmarked "Mexico 925 Taxco" in a circle with "AIM” in the centre. As well, there is an eagle stamp with a number 3, which also signifies Taxco sterling silver. Diameter: 1.5"