A large pic of the item would be quite helpful indeed, but just by the general overall "feel" of the hallmark I would say that it is from Mexico and the "MC" refers to Mexico City. The Mexican hallmarks used numbers following a pair of letters, such as TS-25 and examples such as that.
Again, a larger pic of the item is required. But I have seen many hallmarks from Mexico and this is consistent with other examples in my experience.