English: A unique money letter with 50 florins in the form of banknotes from Prague to the town councillors of Ungarisch Skalitz (today's Skalica, Slovak Republic), paid in full on posting and sent by registered mail on 11.9.1783. The content of the letter was counted on posting and sealed according to the valid regulations with one seal of the sender and two seals of the office of posting, i.e. an office of the so-called Lesser or Clapper Post. The letter was dispatched for transportation by the Chief Post Office in Prague and cancelled with the first type of post office stamp, the single-line stamp "Von Prag". The Lesser or Clapper Post was operated in Prague as a private post service in the years 1782-1789. The stamp "Von Prag" began to be used in 1782.