Aztec Rose design small Silver 900 fine Butter Dish or Nut Dish made in Mexico.  It is in good used condition with no monograms.  It measures 4" in diameter and weighs 43.7 grams.  This same design was made by multiple silversmith in Mexico between 1940-1960.  The hallmarks on the back are incomplete and hard to identify the maker.
16-6-21b