In the exalted category of chiming wristwatches, the ZEITWERK MINUTE REPEATER is a technical sensation: articulately designed, it combines a mechanical jumping numerals display with a decimal minute repeater for the first time.
When they developed the strike work for the ZEITWERK MINUTE REPEATER, the engineers were able to harness the basic principle of the jumping numerals mechanism. The time is displayed with an hour ring and two minute discs instead of with hands. Three snails connected with these mechanical display elements separately sample the number of hours, ten-minute intervals, and minutes to be acoustically indicated.
|Zeitwerk Minute Repeater Striking Mechanism|
|The L043.5 Manufacture movement|
To assure that the repeater sequence is not prematurely interrupted due to the depletion of the mainspring’s power – in which case the watch would stop running as well –, the striking mechanism can no longer be activated if the remaining power reserve is less than twelve hours. On the power-reserve indicator, this point is identified with a red mark.
With its eminently legible jumping numerals display, the ZEITWERK MINUTE REPEATER stands out as a paragon of eloquent design. The patented constant-force escapement delivers a uniform amount of energy during the entire power-reserve period. As the source of the switching impulses, it reliably controls the numerals display minute by minute.
The L043.5 manufacture calibre inside the ZEITWERK MINUTE REPEATER is lavishly and meticulously hand-finished. Beneath the hand-engraved balance cock, the balance wheel with eccentric poising weights and a free-sprung balance spring crafted in-house breathes with a frequency of 18,000 semi-oscillations per hour. The resonant timekeeping instrument with a diameter of 44.2 millimetres is available exclusively in platinum.
The solid-silver dial shimmers with a rhodié hue. Made of black-rhodiumed German silver, the time bridge prominently frames the hour and minute numeral apertures that are located on the same plane.
The black-polished steel gong hammers are visibly arranged on both sides of the subsidiary seconds dial. The hours are struck on the left, the single minutes on the right. For the double-tone ten-minute counts, both hammers strike both gongs slightly offset in time.
Model: ZEITWERK MINUTE REPEATER (Ref. 147.025F)
Lange manufacture calibre L043.5, manually wound, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; three quarter plate made of untreated German silver; balance cock engraved by hand; constant-force escapement
Movement dimensions - Diameter: 37.7 millimetres; height: 10.9 millimetres
Movement parts: 771
Screwed gold chatons: 3
Escapement: Lever escapement
Oscillator: Shock-resistant balance wheel with eccentric poising weights; balance spring manufactured in-house, frequency of 18,000 semi-oscillations per hour; precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 36 hours when fully wound if the striking mechanism is not activated
Time display in hours and minutes with precisely jumping numeral discs, subsidiary seconds with stop seconds, power reserve indicator, striking mechanism with decimal minute repeater
Crown for winding the watch and setting the time; pusher for activating the striking mechanism
Diameter: 44.2 millimetres; height: 14.1 millimetres
Crystal and back: Sapphire crystal (Mohs hardness 9)
Solid silver, rhodié
Time Bridge: Black rhodiumed German silver
Hand: Rhodiumed gold
Hand-stitched alligator leather strap, black
Buckle: Lange deployant buckle in platinum