P15 prototype 
Which car is this?
Is there anyone who can explain this mystery?

Is this a prototype with early P15 N tracks?
The picture was taken in 1927 at Mount Renart, a place where CitroŽn made several test runs.
The car seems to be of type B14/B15 with a 4 cylinder engine, with extra long and wide snow rubber bands . the boogies looks like the final version of the P15 N. But the tracks are all in rubber!
The same car, is pictured on the newspaper L'Ouest-Eclair from January 14th. 1928. The rubber track are very clearly with theirs distinct CitroŽn logo!