The Marty system telephone - with its characteristic salt box silhouette popularized by Jacques Tati's film Jour de Fête - was invented in 1910 by the PTT (Posts, Telegraph, and Telephones) administration in an attempt to standardize the various devices on the market. Manufactured by the A.O.I.P (Association of Precision Instrument Workers), this model was the first in the State network to meet precise specifications and to be mass-produced by several companies. Composed of a cubic box in varnished walnut, it was equipped with a side crank that allowed calling the operator and a handset composed of a receiver for listening and a microphone for speaking.