Vintage Silver Ball Necklace from Iguala, Mexico

A fine, light, and small hand-made graduating hollow bead necklace from Mexico. Lovely beads threaded on a copper chain. The smallest bead is 4 mm across and the largest is about 10 mm across. In good vintage shape with some oxidation.

Marked "Iguala, MVM, hecho en Mexico, 925" on the clasp. The 925 mark is hardly visible but can be seen under a magnifying glass. The necklace tests positive for sterling silver. 

Length is 41 cm (14"). Weight is 14 grams.