The top two are railway stamps not listed in Scott
The middle one is a Cinderella bemoaning the loss of the German Colonies after WWI. The bottom two are: Left: a Private courier issue (probably late 1880s-90s) for intra-city mail - listed in one of the specialized Michel catalogues. Right: Post WWII Allied occupation of Germany (Russian Zone - West Saxony) Roy
Thanks for the help! Take Care, Big Daddy Dave
The stamp at the lower left is from the Munich private city-post "Courier". This service started on 25 Sept 1896 and continued until 31 March 1900.