The Short Version
The core facts of this claim are well established: Ferdinand Adolph Lange founded his watchmaking enterprise in Glashütte on December 7, 1845, as confirmed by numerous authoritative horological and auction-house sources. The one caveat is that the exact firm name at founding was recorded variously as "A. Lange, Dresden" or "A. Lange & Comp." across primary references, with "A. Lange & Cie" appearing to be a later or colloquial designation rather than the verified original trade name.