Mexico Sterling Pendant Brooch Marked MNC

Offered is a delightful Mexico sterling pendant brooch combination.  It has a classic hand engraved design that features a burro, cactus, and mountains.  The background has a fine intricate hand applied stippling as shown.  This measures 1 3/8″ in diameter. It has an unusual hallmark on the reverse side that includes Hecho en Mexico, 925, and the initials MNC enclosed in what appears to the be the head of a stylized bird.  The jewelry has no condition issues.  Total weight:  6.2 grams