This looks to be the deluxe UE8 model, with the original fenders and the frame tabs for the rear rack (now missing). By the graphics, the metal gear levers, and the 52/36 chainrings, I would date this to around 1969. The only replacement parts I could see are the front derailleur, the quick-release skewers, and of course the seat. It still has the plastic (sorry, Delrin®) Simplex rear derailleur.
by spike