Hi. I have a 1977 model HP-01 watch that is losing much more than the 30 seconds per year these were originally calibrated for. I'd like to recalibrate it, if possible. Does anyone here have any knowledge, either direct or as a web reference of this procedure? I can't seem to locate any potentiometers on the board at all, there seems to be no adjustments to tweak - though admittedly I've been unwilling to completely disassemble it without further information... I'd really like to get this thing back up to specs - as it is now, it loses about a second per day - 00:06:15 per year. Does anyone here remember anything about the method to correct this?
Recalibration of HP-01
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