Back to the Future License Plate Pin. Shows the California 2015 futuristic License Plate from Doc Brown's DeLorean Time Machine. A Nerd Block exclusive collectible pin. Made with high quality metal Brand new Wear your love of Back to the Future with this stylish enamel pin! Detailed enamel pin features the California 2015 futuristic License Plate from Doc Brown's DeLorean Time Machine. A Nerd Block exclusive. Put on jacket, bag, purse, backpack or lanyards. Gift it to the Back to the Future fan!