Three more... as long as I am asking.
Okay well the first one's not military so there is no unit- BV might be Blohm und Voss, so it's likely a factory worker's identification tag. The Fahrschwadron was horse-drawn cart transport (usually), and that's from the 6. Infanterie-Division I believe. I doubt you'll find out what the 176/324 is- it's not a Luftwaffe MOB-Nr. and that's the only code list that I know of; that mark is odd too that it has a slash in it. The last one is a Fliegerhorstkommandantur but I have no idea what 51 545 is- it too isn't an MOB-Nr. nor would it be for an airfield command- those are usually plain text. It's not a Feldpost-Nr. either- that number was for someone different.
Ohhhhh- pillage then burn...
Thanks as always, I appreciate your knowledge.