A.Lange & Söhne presents LANGE 1 TOURBILLON PERPETUAL CALENDAR “25th Anniversary”.

As a tribute to its anniversary, A. Lange & Söhne introduces the most complicated model of this watch family in a 25-piece limited white-gold edition with blued-steel hands. The tourbillon cock is graced with a blue engraving shaped like the Lange outsize date with the number 25. The argenté-coloured dial of the “25 th Anniversary” edition has discreetly nuanced shades of blue. The palette ranges from thermally blued-steel hands to all inscriptions, including the numerals of the outsize date and the alligator leather strap.  The high winding efficiency of the automatic calibre L082.1 is attained with a heavy central rotor featuring an outer centrifugal mass in platinum