Of course the original is a classic but mainly for the movement. For me it was too small, I don’t like Roman numerals on a chrono, Lange is known for the gothic numerals, and the power reserve was pretty short. When the Up/Dn came out in 2012 I knew it would be my first Lange. Larger case, Up/Dn power reserve, 60 hours, baton hour markers, and oh that same stunning movement!