The fusee and chain complication from Lange is a rare and pure horological creation. Very few brands have had the courage to attempt this, given the micro mechanics of having to pack a 15 cm long chain together with a horde of components into the confines of a case.
Patek, VC or AP have never created a fusee and chain based watch.
This is where A.Lange & Sohne shines… and without hype.