This is a custom painted, restored Bike Friday tikit, one of the later models after all the frame reinforcement / safety recalls had been done.  This was from the models which have the seat mast that is reinforced against cracking and has the steering mast that is post recall.  It is the Model T / T-knob / twiddly knob variety, called 'Impulse fold' by Bike Friday.  Not the hyperfold, which though interesting, was failure prone.