Presented in September 2023 for the Shanghai edition of Watches & Wonders, the Lange 1 Perpetual Calendar 345.036E is the first version of A. Lange & Söhne's self-winding Lange 1 perpetual calendar made in Platinum, and it pairs that metal with a Black dial of solid silver. It joined the two references that launched the model in April 2021, a Rose Gold version with a Grey dial and a 150-piece White Gold edition whose dial is cut from solid Rose Gold, and like the Rose Gold model it is made without a numbered limit and offered through Lange boutiques. The change of colour does more than refresh the model. Lange chose the dark dial deliberately, presenting it as an ideal background for the moon phase and its integrated day and night indicator, and it gives the self-winding Lange 1 calendar a sharper, more contemporary face. The manufacture's history with the complication reaches back to the Langematik Perpetual of 2001, its first perpetual calendar of the modern era, and the 345.036E shows how far Lange has taken the idea since then: a full perpetual calendar, with every display jumping instantly, contained within the off-centre composition of the 1994 Lange 1.
The Platinum case is 41.9 mm across and 12.1 mm high, its proportions identical to the gold versions but its weight and its cooler, deeper lustre setting it apart. Discreet correctors are recessed into the left flank so the calendar displays can be adjusted without disturbing the profile. Against the Black dial every element stands out in rhodium-plated gold: the applied Roman numerals and markers of the hour circle, the hands, and the frame of the outsize date. The month names sit on a ring around the periphery, a band that frames the dial instead of adding subdials to it, and the retrograde day of the week and the leap-year indication are placed so they never compete with the time. In the seconds subdial at lower right, the moon phase with its day and night sky shows to particular effect, its moon and changing background reading more sharply against black than against the Grey or Rose Gold of the earlier versions. The overall impression is monochrome and technical, with no warm metal anywhere on the front of the watch. A hand-stitched black alligator strap and a Platinum prong buckle complete it, carrying the same restrained palette from the case to the strap.
The perpetual calendar inside tracks months of 28, 29, 30 and 31 days and the four-year leap cycle, so once it is set it will run correctly until 2100, the first year in which the Gregorian rule omits a leap day. Lange's distinctive contribution is speed. At midnight the outsize date and the retrograde day hand switch in a single instant, and at the end of each month the peripheral month ring does the same, so the calendar is never seen halfway between two states. Moving a ring that spans the whole dial in that way requires far more force than a classic perpetual calendar, which advances small hands and discs gradually, and the movement has to build up that force and release it at the changeover. Individual correctors let the owner adjust a single display after the watch has stopped, or move the calendar forward as a whole. The moon phase turns with the lunar cycle while its sky shifts between day and night. All of this is driven by a self-winding movement of 621 parts, 63 jewels and five screwed gold chatons, built on the base of the Lange 1 Daymatic, with a gold rotor weighted in Platinum and 50 hours of running time. Seen through sapphire, its bridges are cut back to show part of the going train.
The Lange 1 family has carried a perpetual calendar since 2012, when the Lange 1 Tourbillon Perpetual Calendar introduced the peripheral month ring and the instantly jumping displays. In 2021 Lange separated the calendar from the tourbillon, building the Lange 1 Perpetual Calendar on its self-winding Daymatic movement and launching it in Rose Gold with a Grey dial and in a 150-piece White Gold edition with a solid Rose Gold dial. The Platinum 345.036E arrived two years later and completed a trio that now covers three distinct moods: warm Rose Gold and Grey, the soft White Gold and salmon-toned gold of the limited edition, and this cool Platinum and Black. Platinum has framed several of Lange's most collected references, from the original Datograph of 1999 to the Platinum and Rhodium Lange 1 known among collectors as the Stealth, and its use here places the self-winding perpetual calendar alongside them. The Black dial, meanwhile, gives the model a character the gold versions do not have. Together they give the calendar a version that sits comfortably beside the manufacture's grandest complications, while keeping the everyday practicality that was the model's purpose from the start.
The 345.036E is for collectors who want a perpetual calendar they can wear every day without it looking like a ceremonial piece. Its Black dial gives a sporting crispness to a grand complication, and the rhodium-plated details keep the information readable at a glance in any light, while the instantly switching displays make every midnight, and every month end, a small event. Self-winding keeps the calendar running as long as the watch is worn, so the complication remains a practical tool. The Platinum case brings weight without ostentation, the kind of luxury noticed by the wearer rather than by others. It will appeal to owners of a Platinum Lange 1 or Lange 1 Time Zone who want a calendar companion in the same metal, to collectors of perpetual calendars looking beyond the traditional subdial layout, and to anyone who finds the Grey or Rose Gold versions too warm for their taste. At 41.9 mm by 12.1 mm it has a confident presence, and the sapphire caseback shows the decorated movement in full, from the engraved balance cock to the gold rotor with its Platinum mass.
