Mexican Silver Baby Deer Abalone Inlay GPA Brooch

Sweet vintage Mexican silver and abalone inlay baby deer brooch. It has a slight puffed out design and he wear an adorable expression as he looks over his shoulder. Its hard to make out the mark on back, definitely says "Mexico" under the initials GPA, but I cant read the words on top. It could be sterling silver but looks more like Alpaca (nickel) silver. --1 1/2" high x 1" wide. -- Nice vintage condition with just some tarnish.