The movement is the Seagull ST-19, it's the most reliable movement on a rep chronograph, people refer to it as "Bulletproof", you can't go wrong with one of those movement, it's manual wind @ 21,600BPH. Just a quick FYI, there is no gen of the "Skeleton" Patek you have there, however don't worry, most people haven't heard of Patek Philippe nor they know the models and variations so you're good to go!
I'm gonna recommend Ruby, she has the same watches at a much lower priced, I wanna recommend you this Patek Philippe Chrono with a fully working 30 day moonphase sub dial:
http://www.nicereplica.com/pro_detail.php?ProId=108
Or this one with a working power reserve with a really beautiful dial:
http://www.nicereplica.com/pro_detail.php?ProId=110
The best part is that Ruby will send you a pic of the watch she's sending you on your request, and she will check your watch before shipping [QC] and it's $90+ less than on Andrew's site! See there, Just saved you a few bucks!
**BTW here's her section before you ask if she's trusted:
http://www.rwg.cc/members/index.php?showforum=159