D’Yrsan Course 4 cilinder 1100 cc met Cozette compressor. Bouwjaar 1928.

"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. On the three wheelers the single wheel was placed at the back.
Production ended in 1930."

Image Source: http://www.klassiekerrally.nl/interclassics-topmobiel-2014-pre-war-race-legends/
Text source: http://en.wikipedia.org/wiki/D’Yrsan