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--- a._lange_soehne_datograph_up_down [02.12.2022 19:42] – created - external edit 127.0.0.1
+++ a._lange_soehne_datograph_up_down [09.04.2024 15:06] (current) – gerdlothar
@@ Line 1: / Line 1: @@
+====== A. Lange & Söhne Datograph Up/Down ======
+{{wst>image_cr|A. Lange & Söhne|Datograph Up Down|Datograph Up/Down (platinum), Ref. 405.035}}
+{{wst>image_cr|A. Lange & Söhne|Datograph Up Down (2024)|Datograph Up/Down (white gold, 2024)}}
+{{wst>image_cr|Lange|L951.6}}
+The **Datograph Up/Down** (German: **Datograph Auf/Ab**) is a wristwatch by [[A. Lange & Söhne]].
+[[2012]] variant of the well-known [[flyback chronograph]] [[A. Lange & Söhne Datograph|Datograph]] with additional [[power reserve indicator]] (called "up/down" at Lange).
+The case diameter was increased to 41 mm, so that with the new caliber and an enlarged mainspring [[barrel]], the power reserve of the original model could be increased by 24 hours to a remarkable 60 hours.
+Rhodinated gold [[baton]] hour markers on the dial – they also replace the former Roman numerals II, VI, and X – emphasize its clear design and identify the watch as a member of the [[Saxonia]] family that was just revised the year before.
+In April [[2024]], Lange presented a version of the Datograph Up/Down with a [[white gold]] case at [[Watches & Wonders]] to mark the 25th anniversary of the Datograph.
+<WRAP ud ud_mod>
+**Reference:**
+  * 405.035 [[platinum]]
+  * 405.028 [[white gold]]
+**Movement:**
+  * [[Hand-winding]] movement [[Lange L951#L951.6|L951.6]], 18,000 A/h
+  * [[Chronograph]] with classical [[column-wheel]] mechanism, with [[flyback]] function
+  * [[Big date]], [[small seconds]]
+  * 46 [[jewels]]
+  * 4 screwed gold [[chaton]]s
+  * [[Swan's neck fine regulation]]
+  * [[Plate]]s and [[bridge]]s in untreated [[nickel silver]]
+  * [[Balance cock]] engraved by hand
+  * 451 components
+  * Power reserve 60 hours
+**Case:**
+  * [[Platinum]]
+  * Ø 41 mm, height 13.1 mm
+  * Above [[sapphire crystal]]
+  * Caseback sixfold screwed with [[sapphire crystal]] sighting window
+**Dial:**
+  * Solid [[silver]], black, applied baton markers
+  * Lancet hands in [[Gold]], [[rhodinated]]
+  * Hour and minute hands coated with [[superluminova]]
+  * Small hands in [[blued]] steel
+**Functions:**
+  * Hours, minutes, [[small seconds]] at 8 h
+  * [[Flyback]] [[chronograph]] with 60-seconds counter as [[central seconds]] and precisely [[jumping]] 30-minutes counter at 4 h
+  * [[Big date]] at 12 h
+  * [[Hacking seconds]]
+  * [[Power reserve indicator]] at 6 h
+**Bracelet:**
+  * Blue-grey crocodile leather, hand-sewn, with [[tang-type buckle]] in [[platinum]]
+</WRAP>
+{{tag>Watch_models Chronographs A._Lange_&_Söhne_models A._Lange_&_Söhne_Datograph_models}}