Originally Posted by
walkerwek1958
Same advice as I always give when a watch is suspected of running fast or slow: initially ensure its fully wound, monitor it over a few days versus a reliable source, write down the figures morning and evening, store dial-up overnight. This will allow the 'on the wrist' rate and the dial-up rate to be measured. If these figures confirm the initial observations the watch needs attention and you're armed with some proper data. A watch under warranty really needs to go to the AD, if someone else messes with it the warranty is likely to be void shoud there be further problems.
I think it unlikely to be magnetised, its more likely that its not regulated correctly, but without checking it properly on a timegrapher this is speculation. Provided the amplitude is OK and the watch is running well its straightforward to regulate properly, but I certainly wouldn't be messing about yourself on a new watch.
Contrary to previous comments Seikos are tricky to regulate, even with a timegrapher. There's no fine adjustment, the regulator arm has to be moved very carefully and it doesn`t move smoothly, you end up going back and forth until the desired number is observed on the machine. It's difficult to increase or decrease the rate by a set amount, frankly they're a pain to do. Anyone who's had good results doing it by trial and error has been v. lucky.
In my experience cheaper Seikos are often out of beat significantly too, that definitely needs a timegrapher to correct.