Yes we knew that this car is very difficult to guess, but we never know what will happen. This time only two courageous readers dared to send in an answer, and one of them came quite close. Roger told: "This is à Cyclecar (Autociclo) David manufactured by Jose Maria Armangue in Barcelona"; almost but not completely correct. The car pictured is a very rare Dobi, a cyclecar marque based in Madrid which produced cars in little quantities only between 1919 and 1922. In this page of Autopassion you can find the only information known till recent days, when the above postcard was discovered... in the archives of the David company of Barcelona!
Without doubt the Dobi was a "copy" of the David cyclecar, with the same semi-automatic gearbox and chassis design but with an strange front axle formed by many thin tubes(can anyone explain the priciple here?) and a single leaf spring. Written on the postcard is "Tipo Sport"; based on that we suppose that the car pictured should has one of the "big" four cylinder engines, possibly the french made Ballot, which was used in the last Dobi produced. Also is unknown the concrete number of cars assembled by this little factory, and of course there are no survivors known. That is to say until somebody comes forward...