(1st post from new guy here!) I have a Timegrapher and found that it's useful for quickly finding the differences in timekeeping in different positions of a watch, so that if I want to compensate for minor accuracy errors, I can leave the watch in a specific position overnight. For example, my daily wear Hamilton Khaki Navy Scuba (with H-10 movement) runs slow by about 2 seconds per day in normal usage (which is already quite good). I measured the watch on the Timegrapher in a bunch of different orientations and found that the crown down position ranges from +2 to +4 seconds per day. (Most other positions measured between -1 and -4.) So if I leave the watch sitting crown down overnight, it makes up most of the normal error, leaving it less than -1 second per day overall on most days.