Newbie to Heuers here. Does everything look authentic here? For non-Tag Heuers I generally see the Edoard Heuer & Co on the movements, not the Heuer logo on this watch. I'm questioning whether this movement has been modified to look authentic. I would appreciate someone with more knowledge than me to give me their thoughts on the authenticity of this watch. Many thanks.

http://cgi.ebay.com/HEUER-CHRONO-TWO-REGISTER-MENS-ORIGINAL-DIAL-42mm-/260616697426?cmd=ViewItem&pt=Wristwatches&hash=item3cadf73652