I've been playing with my new MicroSet timer on a 3133 movement. The watch is nearly new but it was way off, but I managed to get the beat error down to 0.8 ms and the rate to around +4.0 sec/day.
It seems like if I adjust the rate, the beat error changes slightly, so I wondered if there is a relationship between the two?
Also, what is a "good" beat error -- I suspect zero is best, but is 0.8 ms acceptable?
One more question: The 3133 is rated at 21,600 bph. So is there a relationship also to how fast or slow the watch will run and how close to the 21,600 bph I can get it? In other words, if it's running say 21,610 bph, does that mean it will run + seconds per day?