Comparison
A detailed comparison of the A. Lange & Söhne 1815 Rattrapante Perpetual Calendar and Patek Philippe 5204. Explore design, movement, and functionality differences between these high-complication watches.
69 replies97256 views
Collection
Explore A. Lange & Söhne collector Clueless_Collector's quest for his twelfth timepiece. Discover community insights on Datograph, Langematik, and Perpetual Calendar references.
114 replies28512 views
Collection
Explore foversta's 2016 A. Lange & Söhne year, featuring the Richard Lange Jumping Seconds, Saxonia Moonphase, and Concorso d'Eleganza. A collector's journey.
8 replies25970 views
New Release
Explore A. Lange & Söhne's 2015 SIHH collection, featuring the Zeitwerk Minute Repeater, redesigned Lange One, and Datograph Up & Down. Insights on Lange's strategy.
25 replies23155 views
Collection
Donizetti seeks advice on consolidating his A. Lange & Söhne collection, including Datograph, Langematik Perpetual, and Double Split. Explore options for new acquisitions.
41 replies22781 views
Manufacture
Relive A. Lange & Söhne's 20th anniversary of the Lange One. Explore the brand's rebirth, iconic watches, and the vision of its founders.
21 replies18610 views
I don't understand your question...
Of course it is in-house like any other Lange watch. Of course some specific parts could have been developped with some external providers but why do you have such question in mind? Fx
Not trying to pick a fight here. Merely asking a question...
...because I don't know. I know the Datograph part is all inhouse, but I don't know if the perpetual part is 100 per cent inhouse. May I ask why it is so wrong to ask this question?
Not wrong... a bit unclear...
The PC module was designed in-house and is exclusive to Lange. But I never feel comfortable with this kind of question since I don't know what in-house exactly means. Do we know if a specific department of another brand from Richemont was involved or not ...