That looks like a Dahon Courser, a chinese model that was never sold in America or Europe. I bought one on Ebay a few years back but sold it on quickly, not because it wasn't good but rather I settled on a Vitesse instead. It looks identical to the model I had which was from 2007. In the west Dahon changed their frame design in 2008 so that the latch is on the opposite side to this; if that happened in China also then this must be a 2007 model.