Ryaku,
I hope this can help you.
Take in conunt that in SD the absence of the cyclope get the data reading just a bit difficult than in the sub. Wile the without cyclope shape is sure better.
http://orchipalar.blogspot.com/2010/04/potpourri-of-rolex-n-tudor-fakeee.html
and again:
http://www.network54.com/Forum/207593/thread/1269763708/TIPs+to+Spot+FAKE+551X+n+1680+Sub+watch+cases..Pls+comment..%2B%2B
Welcome on RWG!
IMO:
Choosing between this 3 REPs .
-Timewalker is sure the better (out of the box).
-Porto, need a lot of updates.
-The Primero is wrong like Rep .
I'm not totally convinced about this aftermarket too.
For sure the E.L. are wrong and the links appear to be swallowed.......... for 675$.
I suggest you to look for a gen one.