F1 2013 Season Brazilian GP Mercedes W04 Racing Car Used Racing Car Slice Model. From the F1authentics website, with a certificate of authenticity included. The product number is F1A0034953. The codes on the display item and the certificate match. Please note: The Hamilton signature on this product is not a genuine signature, but an official printed signature. F1authentics' racing car slice collection is sent out at random, but this product has been opened and photographed, and the item shown in the image is the actual product you will receive. The front surface has a silver and black honeycomb pattern, and the back has a black mesh structure.