Unable to give an opinion on the tuning fork movement hidden in the case. Does it run? Externally, looks good. Don’t buy it if there isn’t a return policy. If you do buy it, be prepared for a movement that may need an expensive repair. Price?
It's genuine.
But be aware that if it ever needs service/repair then the options are very limited, there are only a handful of experts across the world who can correctly diagnose/repair/service these tuning fork movements.
Couple of things to check that will provide more detail than just seeing it run.
1. When setting time, does the second hand move? If so, the index wheel might have excessive wear.
2. Does the date advance cleanly through all 31 days? If not, the calendar wheel (which is plastic) may be worn.
Either of those problems suggests a service. There are still some watchmakers that can service that movement, but most local watchmakers do not have the expertise or specialized equipment that is required. You can search the forum to find recommendations.
Yeah, the calendar wheel on these is prone to damage. Typically you'll find that it gets stuck on one day of the month. Replacements are difficult to find, but available and the work can be undertaken by a normal watchmaker - provided that you can persuade him to do it... The calendar wheel is a hands and dial off job, no different to a mechanical watch, no different to a quartz.
You just need to convince the watchmaker that there be no dragons on that side of the movement.
