Car manufacturers A. Simille and G. Pequinot were not all that successful really. In 1927, their first prototype left their factory in Asnieres on the Seine and the final car rolled off the assembly line in 1928.
The company did not manufacture its own engines. The customer could choose from existing 1100 or 1500cc, four-cylinder engines.
The Spag make offered a comprehensive range from a small sports car to more luxury passenger cars. It is not known how many cars the make sold, but it cannot have been all that many.
The complete encyclopedia of Vintage Cars - Rob de la Rive Box