There are few if any models in the world to rival the Ferrari 312PB built by Pierre Scerri. This 1:3 scale masterpiece is the real thing in every sense, from its operating 100cc 12-cylinder engine to the exact scale operating Ferrari gauges which are calibrated precisely to indicate rpm, oil pressure, water temperature and oil temperature. It took Pierre 15 years and more than 20,000 hours to build this car! He learned to make glass so he could make the exact pattern lens for the operating headlights. He learned to make rubber so he could mold his own tires. The creator of the original gearbox even came out of retirement to produce an exact 1:3 scale version for the model.
found at MAKE: Blog