If you don't mind a second opinion, I think Alex is right on both counts. The dial has a few characteristics that indicate it is not original. Notice the bluish tint to the numerals? The original enamel work was vivid black. Also, the Vacheron & Constantin fonts are quite large when the original style was very delicate in this area. As far as the movement goes, it has the style of a typical Swiss movement from 1890 or thereabouts but as Alex said there is nothing to indicate Vacheron. Even without the expected markings, I'd say the shape of the center bridge and regulator is not of Vacheron design.