PRINZIP R is a German Porsche 911 restoration and optimization atelier founded by Martin Anders and master craftsman Marco Hinderer. It works on customer-supplied donor vehicles, mainly air-cooled Porsche 911 models, and does not manufacture or sell complete cars under its own marque. Its services cover backdates, OEM-plus restorations, project management, donor-car sourcing, design coordination, technical refurbishment and final testing.The…