


IMO everyone should invest in a timegrapher and regulate ASAP
Or at least have a local watchmaker do it. Granted I have a sample of three, but all of mine had factory QC advertised accuracy (which was way off after shipping) but after having them regulated they run so much more accurate. Wore my QF Explorer II for two weeks (off at night and on during daytime) and it was no more than +/-1 second but most of the time it was 100% spot on to UTC to the second.