Citroën Light Fifteen Roadster : 1939 : : : In Slough (GB) built RHD version of Citroën's Traction Avant

Due to differences in the calculation of fiscal horsepower, the cars were given different names.

the 7CV became the Light Twelve

the 11CV became the Light Fifteen or in long wheelbase version the Big Fifteen

and the 15CV became the Six Cylinder or Big Six.

(citroenet.org.uk)

Done