[1][2][3][4] Raymond Siran de Cavanac, who previously had worked with the Levallois-Perret based automobile manufacturer S. Sandford, founded his own business in 1923 at Asnières-sur-Seine, concentrating on small cyclecar style vehicles under the D’Yrsan name, with three or four wheels.
The three wheelers with which the business started loosely resembled the three-wheeler Morgans of the same period.
[5] Later came the D’Yrsan "Model DS" with 1097cc for which a maximum output of 35 hp (26 kW) was listed.
[3] With sales volumes remaining modest, the manufacturer sought to make the D’Yrsan name better known by entering a car in the June 1929 24 Hours of Le Mans race.
[7] A car was entered, but unfortunately had to retire after nine laps, having completed fewer than 150 km (93 miles).