116610 Posted June 12, 2011 Report Share Posted June 12, 2011 My sub rep runs + 1-2 seconds a day. Do gen watches really run +4-5 seconds per day and that's within expected limits? What are others experiences? What do people do to regulate? Place it cg up etc? Link to comment Share on other sites More sharing options...
Nanuq Posted June 12, 2011 Report Share Posted June 12, 2011 Good questions, do lots of searching here, there are dozens of topics about it. You've got COSC performance already, good job! Link to comment Share on other sites More sharing options...
freddy333 Posted June 12, 2011 Report Share Posted June 12, 2011 Link to comment Share on other sites More sharing options...
FxrAndy Posted June 12, 2011 Report Share Posted June 12, 2011 I have known gens running a lot worse than that Link to comment Share on other sites More sharing options...
rosnik Posted June 12, 2011 Report Share Posted June 12, 2011 I have known gens running a lot worse than that +1! I got some... Link to comment Share on other sites More sharing options...
gran Posted June 12, 2011 Report Share Posted June 12, 2011 It is important to remember that even when a mechanical watch is allowed to vary +6/-4 seconds per day, that does not mean it will consistently vary by that high an amount each day. Mechanical movements--except the very rare 'turbillon' movements that correct for it--are noticably affected by the gravitational pull of the Earth. It only takes a performance distortion of 1/1000th of a percent for a watch movement to be one second less accurate in a day. This causes the performance of mechanical movements to be somewhat different from day to day when not stored in a fixed position. The good news is that the actual variations of a mechanical watch will often cancel each other out. This means a mechanical watch will tend to be more accurate over a longer period than the single-day COSC measurement may imply. Link to comment Share on other sites More sharing options...
Tiyal Posted June 12, 2011 Report Share Posted June 12, 2011 +2 on a asian 21J. Link to comment Share on other sites More sharing options...
highoeyazmuhudee Posted June 13, 2011 Report Share Posted June 13, 2011 +2sec elabore grade 2836 another example of reason to not spend 12X the price on a gen rolex movement. Link to comment Share on other sites More sharing options...
TeeJay Posted June 13, 2011 Report Share Posted June 13, 2011 I've got mine to +0.5 over 24 hours, but this has taken at least 24 hours of constant observation and correction, which, without proper timing equipment, can get frustrating Link to comment Share on other sites More sharing options...
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