LA6NCA's German Military WWII Receivers, and a Luftwaffe Receiver with FAST QSY

Discussions of old military radio gear are dominated by talk of U.S. radios.   Yesterday in the comments section of the SWLing Post I found two interesting videos about German WWII equipment.  Above you can see LA6NCA's receivers.  Below there's a video of a Luftwaffe receiver with an amazing capacity for really rapid frequency change.