DescriptionRiefler clock drawing.png English: Drawing of the astronomical regulator clock made by the German firm Clemens Riefler, first sold in 1902,...
DescriptionRieflerClock.jpg English: Drawing of the Type D Clemens Riefler observatory regulator, with glass tank and electric rewind mechanism. Date...
DescriptionRiefler escapement drawing.png English: Drawing of Riefler escapement, invented by Sigmund Riefler in 1889, from the catalog of the Columbian...
