How do I find the item number of a listing that I believe contains a misleading title?

I want to buy a genuine Naudic dress,not one that is listed under the Naudic category/brand,but is actually the Portobello brand.I don't know where to find the item number for the Portobello dress.

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At the top of the listing is

 

 

Description Postage and payments    to the right of that is        print   report item
Under that is      
              
Seller assumes all responsibility for this listing.  to the right of    that is the item number.