In Vienna, a regulator was the Master Piece required from apprentices to be recognised as masters. Such Master Pieces, although apparently very simple, were of outstanding workmanship with, for the best, the escapement fitted with jewelled pallets and bearings. As opposed to Frenh and English regulator movements, always made with a robust train of wheels secured between two massive plates, the pendulum fitted with a sophisticated and expensive compensation, in order to reduce frictions, the Viennese regulators were made with a very delicate movement. Their train consisted of very light wheels with very thin pivots secured between thin plates in order to reduce friction as much as possible. Their pendulum were made with a simple rod of wood or steel, associated with a brass bob. Therefore, Viennese regulators even with a long duration movement, could he driven by relatively light weights, compared to those ol French and English regulators. They could run with precision for a very long time, demonstrating the ability of their makers to produce very efficient timekeepers with the simplest means.