Product of very good quality, perfect finish. 7750 Valjoux schemes it they Seized it works perfectly, included the function of I time and the system of original stop of the mark. Position in a cronocomparator the deviation gives of single 2,5 seconds every 24 hours with that that this but that above the espectativas of a mechanical clock, the construction of it schemes it this taken care until the minimum it details for a good funcionanmiento, the rotor this anchored on a true system of balls and this blocked by three points like in original Valjoux swiss that the original maker used until principles of the years 90. For everything it and the speed in the shipment like the personal received treatment receives you a greetings and for sure we will make business again. Cándido SPAIN