Mechanical Computers From Then To Now: Greubel Forsey Quantième Perpétuel à Équation
Calculating large numbers is a pain if all you have handy is your brain and a pencil. This is why people have created systems and objects to make the process easier. The Greubel Forsey Quantième Perpétuel à Équation has a mechanical computer that calculates the dates for the perpetual calendar and equation of time. This is a complete departure from the traditional perpetual calendar mechanism.