A few on cover and postcard.
First from a 1920 letter one from Max Koch. Lithograph. producer of cans and bottles to preserve food. although I believe the cinderella to be around 1900/1910.

Next ftom the backside of an 1948 German letter(Eastern part) a nice one from Glysantin. A product which prevents your radiator coolant fluid to freeze. Registered mail to Engeland which explains the blue lines.

And my personal favorite a Fuschertorl pfandlscharte used on postcard in 1938. Really difficult to find information about. I believe it was issued to raise money to pay people to keep the mountain roads snowfree and maintianed during the Winter. But not sure. Have seen a few unused, this is still the only one I have seen used. I hope there are more.

