Vintage Mexico Sterling Silver & Brass Grape Cluster Brooch Pendant 26 Grams

Vintage sterling silver Mexico brooch in grape cluster design. Leaves of the brooch are brass and there is a small dent on the front grape which I tried to show in the 6th picture. There is a bale on the back of the brooch that is large enough to put on most chains and cords. Brooch weighs 26 grams. Brooch measures 2 and 1/8th of an inch length and 2 and 1/4th of an inch across widest point. Stamped Mexico, 925, with a stamp I can't identify and acid tests positive for sterling silver. W