This A. Lange and Sohne Lange 1 reference 101.039 is the watch that fixed the brand's modern identity. Its hand-wound movement pairs the outsize date with a power reserve display, the two indications that helped make the Lange 1 feel unlike anything else in dress watchmaking when it appeared. That matters in ownership, because few watches announce themselves so clearly without leaning on excess. In 18k white gold, the case measures 38.5mm across and 10mm thick, a proportion that keeps the watch balanced and notably easy on the wrist. The silver dial carries the off-center layout that defines the model, with tension and order held in the same frame. Rather than chasing symmetry, the Lange 1 made asymmetry the point, and in doing so gave A. Lange and Sohne a design language it could build an entire era around.