A. Lange & Söhne Saxonia Datograph Perpetual Tourbillon 740.036FE Platinum Black Dial Limited Edition of 100

Introduced at SIHH 2016 and limited to 100 pieces in Platinum, the Datograph Perpetual Tourbillon 740.036FE is the most complicated member of A. Lange & Söhne's Datograph family. It combines a flyback chronograph with a jumping minute counter, a perpetual calendar, the outsize date and a one-minute tourbillon in a single hand-wound movement, finished and assembled twice by hand in Glashütte.

The Black dial arranges the chronograph subdials, the day and month, the leap year, a moon phase with day/night indication, a power-reserve display and the twin-window date around a balanced layout. The tourbillon is visible through the sapphire back, along with the column wheel and calendar work. The Platinum case measures 41.5 mm across and 14.6 mm high, a compact size given the number of functions, and it comes on black alligator, fastened by a Platinum prong buckle that matches the case.