Authenticity Check on Portugieser IW500705

I'm very close to purchasing my first IWC and could really use some help confirming the authenticity of the watch. I got the attached picture from the seller and I've compared it against the IWC site but I'm not really sure what exactly to look for. Any help here is really appreciated. Thanks!

This watch is wrapped and looks like it is taken at a Dealer. 
There is no way of telling anything from this picture. 

Ask to see detail pictures of the watch, the box, the papers and the watch showing a current date. 

If if you have any doubt - walk away!!

Thanks for the feedback. I believe they are a dealer of sorts as they seem to sell a bit on Chrono24 which is where I found the listing. I'm shooting them a note now asking for the pictures you suggested.

These were the follow up pics I got based on your suggestion. Thoughts? Really appreciate the help btw.