Telephony, April 15, 1922, page 16:

French  Pay  Stations  Robbed  of  Receivers  for  Radio  Use.

    Amateur wireless operators are blamed by the authorities for the disappearance of telephone receivers from public pay station booths in Paris and other French cities of late. So extensive have the raids on the telephones become that the government has sent out a "general alarm" circular warning station operators and merchants to be on the alert.
    Disappearance of the receivers, which can be used in radiophony, began shortly after the Eiffel Tower wireless station started broadcasting concerts and news.