I'd propose to add this important reference catalogue to our library:
Hubert Emmerig: Bayerns Münzgeschichte im 15. Jahrhundert : Münzpolitik und Münzprägung der bayerischen Herzogtümer und ihrer Nachbarn von 1390 bis 1470
https://search.worldcat.org/de/title/890557540
It covers the coinage of Bavarian Ducies (Ingolstadt, Munic, Landshut). Some members use for these coins the wrong Emmerig catalogue (Em Reg) which covers only the Regensbusg coinage (i.e. N#105134)
There are two parts which should be united to one reference. I propose “Emm By” as shortcut.