No markings of any sort on the back of this estate piece from out west, but I feel relatively certain it was created in Mexico. I am hazarding a guess that it may be constructed of lesser-grade 800 sterling as is often the case with such filigreed pieces. Measurements are 3 1/16" long x 2". Fully functioning, albeit it rather antiquated, old "C" closure. Could use a good polishing up but otherwise in excellent vintage condition, so make us an offer!