This is  the Racing Porsche 935 casting from Matchbox. This is the first edition of this casting, it was released 30 years ago in 1989. The car has a pint chip behind the right rear wheel. It looks like a factory flaw, as this car  has no playwear. 

This is a true cross-collectible, so if you collect Porsche, Race Cars or Matchbox this will be a very nice addition to your collection. (1:64 Scale)