A. Lange & Söhne enriches the prestigious Lange 1 collection with a new variant, characterised by the use of white gold for the case construction and the adoption of luminescent hands and markers. The classic graphics of the dial remain unchanged, with the large double-window date display at 2 o'clock, the power-reserve indication on the right side and the off-centre hour circle on the left. It should be noted that the date display jumps exactly from one day to the next and can be corrected quickly thanks to a special push-button. The case measures 38.5 millimetres in diameter and houses the exquisite Lange L121.1 calibre (368 components, 43 jewels, 8 of which are in screwed gold settings, plates and bridges in natural nickel-silver, hand-engraved balance bridge), hand-wound, equipped with a double barrel, for a total power reserve of 72 hours (3 days). The strap is black alligator, with a personalised white gold pin buckle.