It has three marks on the base, one is a triangle of which two words I can make out around the triangle 'of Mexico 925'. The other two appear to be an '812' in some sort of shield or something.
I took it to my coin dealer and he tested one of the cup drip plates and the test was not conclusive for silver. Is it possible just the base is silver? It is heavy, 5 pounds, 10 oz on a standard shipping scale. It does not appear to be weighted anywhere.
Any advice appreciated!






