Had my Constellation 564 watch cleaned serviced by my regular reliable old school watchmaker; Can see that he did a good job as the movement is sparkling clean...The watch ran ok for a while...but started running fast...it was 40 minutes fast 2 nights in a row...Took it back-asked him about the hairspring-which he said was ok...After 2 weeks of him timing and observing the watch...I picked it up today and He declared that it is fixed and good to go....Have been watching it it for about 3 hours now and it has run 5-6 minutes fast...Gonna take it back again-I am not a watchmaker....Any one have any clue as to what is going on here? Thanks in advance...RF