A. Lange & Söhne 421.025 1815 Rattrapante Perpetual Calendar Platinum Silver Dial

This A. Lange and Sohne 1815 Rattrapante Perpetual Calendar reference 421.025FE brings together two of the manufacture's most demanding complications in a single watch. it is driven by the manual-wind calibre L101.1, which combines a split-seconds chronograph with a perpetual calendar, moonphase and power reserve indicator, the rattrapante operated by its own pusher at ten o’clock, a pairing that places the watch among the most technically ambitious pieces in the 1815 line. For a collector, that means owning a reference that balances mechanical density with the restraint the model family is known for. In platinum, the case measures 41.9mm across and 14.7mm thick, giving the watch the scale its complication set requires without losing proportion. The silver dial keeps that complexity orderly, letting the calendar indications and chronograph registers sit within the calm, traditional architecture of the design. Few watches unite this much mechanical content with such disciplined presentation, which is why the 1815 Rattrapante Perpetual Calendar stands so securely within modern Lange.