Vintage Sterling Silver Pillbox Pill Box Made in Mexico

Vintage sterling silver pillbox that was made in Taxco, Mexico before 1981. It is hallmarked on the bottom and has a number three eagle stamp. Measures 1" by 3/4" by 1/2" deep. Hinged lid. Weight 7.7 grams. The lid is slightly domed and has a very slight dent. I couldn't catch it in the light to photograph it. Nice little box. These are getting so hard to find.