I had both the gen 15300 and rep 15300. The real deal is light years away from the rep with regards to finishing and the most important part of the watch - the 8 white gold screws. The price is also a huge difference between the two and with that said if you're really after the 15300 start saving the beer money and spend it on the watch. I had to sell the gen off to make way for postgrad education...
Possible ETA-2892-A2 chronograph transplant for sec's @ 12 AP ROO found on the bay...This should be interesting find that is similar to the one that Watchmiester's using...2hrs left to bid!
http://cgi.ebay.com.sg/ws/eBayISAPI.dll?ViewItem&item=280716636809