It's at least an mk3, and as far as I know mk3 is still the newest model. Mk3 has disk brakes, all mk2 pictures I see have rim brakes. I don't know if that was always the case. But note for instance the edge along the top outside of the rear swingarm. Mk2 doesn't have that, see https://en.wikipedia.org/wiki/Birdy_...ller_Birdy.jpg