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Cal L.901.1/L.901.4 Lange 1

February 3 2004 at 2:29 AM

alex  (Login argg)
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Three-quarter plate made of untreated German silver is decorated with Glashütte ribbing, and edges in the movement are chamfered and polished.

A total of 53 jewels 9 of them are held in gold chatons that are secured with blued screws.

manually wound movement with a stop-seconds feature activated when the crown is pulled, a patented twin-disc mechanism for the display of the outsize date.

Screw balance with a Nivarox 1 hairspring, 21,600 semi-oscillations per hour, adjusted in five positions. The hand-engraved balance cock carries the whiplash precision index adjuster.

Its patented beat adjustment mechanism makes it possible to accurately set the impulse pin relative to the pallet fork without removing the balance wheel.

 
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