LANGE REF. 410.025 DATOGRAPH PERPETUAL CALENDAR PLATINUM
A. Lange & Söhne, Glashütte i. Sa., "Datograph Perpetual," Flyback, No. 48021, case No. 158023, Ref.
410.025. Made circa 2008.
Very fine and rare, platinum wristwatch with square button fly-back chronograph, register, tachometer,
perpetual calendar
with oversized date, day & night indicator and a platinum A. Lange & Söhne buckle. Accompanied
by the original fitted box,
instruction manual and a service invoice dated October 13, 2011.
Three-body, solid, polished and brushed, rounded bezel, transparent case back with 6 screws, pushbutton
at
10 for the date correction, sapphire crystals.
Matte silver, made from solid silver, applied white gold radial Roman numerals, baton indexes and
luminous dots,
subsidiary dials for the seconds, the 30-minute register, the day/night indication, the day of the week,
the months and the
leap year, outer tachometer graduation and 1/5th seconds track with 5-minute/seconds Arabic markers,
apertures for the
oversized date at 12 and the moon phases at 6. Luminous white gold alpha hands.
Cal. L 952.1, Glashütte 3/4 plate in German silver, fausses cotes decoration, 45 jewels, including 4 in
screw-mounted
gold chatons, straight-line lever escapement, monometallic balance adjusted to 5 positions,
shock absorber, self-compensating Breguet balance spring, swan-neck micrometer regulator, hack
mechanism,
hand-engraved balance bridge.