Please Observe that commencing in 2005, Rolex began engraving the serial number on the interior bezel (also called the rehaut) beneath the crystal on the six o’clock position. Shinola began like a shoe polish manufacturer, Launched in Rochester, Ny in 1877. It finally went from business in 1960, but in https://www.watchesworld.com/a-history-of-watch-reference-numbers/