Fifth Handwerkskunst edition, a term used by A. Lange & Söhne to define limited special editions featuring a dial and movement finished with rare finishing techniques and engravings. This is the 1815 Tourbillon, which combines the stop-seconds system and the Zero-Reset mechanism with the device invented by Abraham-Louis Breguet. The dial of this edition is in black rhodium-plated pink gold, with tremblage engraving, created with a ridged burin to create a finely grained uniform surface. Limited series of 30 pieces.
Case: rose gold (39.5 mm).
Bezel: pink gold, smooth.
Crown: screw-locked.
Glass: sapphire.
Back: screw-down with sapphire crystal and manual engraving.
Dial: black rhodium-plated rose gold, tremblage engraving, applied pink gold Arabic numeral hour markers, pink gold gladius hands, tourbillon cage at 6 o'clock with blued steel seconds hand.
Movement: mechanical hand-wound, L102.1 calibre, 262 components, 72-hour power reserve, 21,600 vib/h, one-minute tourbillon with patented seconds stop and hand-setting device with patented Zero-Reset mechanism.
Strap: alligator leather.
