Movement Artistry: Up Close with the Decorative Finishes of A. Lange & Söhne

A Lange & Söhne decorates especially beautifully For the special model to celebrate the 25th birthday of the Lange 1, the engravers integrated the number 25 in the style of the famous Lange Big Date and painted the engravings blue, which is the anniversary color.

The spring in the swan's neck fine adjustment mechanism and the cover plate of the escape wheel are given a flat polish by manually moving the components in a figure eight pattern for two hours while pressing them against various diamond-coated polishing foils A Glashütte sunburst is created when the workpiece and the polishing wheel used for production rotate in opposite directions One can readily imagine how long it takes to polish the chaton and the screws, to heat each screw until it acquires precisely the same blue hue as the other screws and to assemble all the parts.

The balance cock of the 1815 Tourbillon has a diamond cap jewel - it's another special feature that Lange uses only on its complicated watches This chronograph movement also contains a particularly large number of steel parts, e.g., springs and levers, which Lange has decorated with a linear brushed finish. . Source