Hello Michael,
I appologize - off your topic, but I am desperate.
I think I found an old post of yours where you mentioned you had 720 Hz Megasonic literature. I just purchased a 1230 and I am hoping you can help me.
The watch sweep second hand is running smoothy, but about 9 seconds slow in 24 hours. I have been looking for information on how to adjust timing. I haven't found any and It is not obvious to me from looking at movement photos.
I have had great success adjusting old Accutrons. I was hoping to be able to do the same with this watch.
I haven't had the back off yet. I want to check the battery voltage first and also check the micromotor oil level.
I have about three weeks to return it. I'd like to keep it if I can get closer to original accuracy and the micromotor looks OK. Cosmetically, it is in great condition.
I am aware of the parts / service issues. What surprises me is that no one that used to service the 720 is interested in taking it on for a cleaning, assuming it doesn't need parts.
I appreciate ant information / advice you can offer.
Pete