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am wondering if any are at least interesting
Maybe. Interesting for you?
Most stamps are from West Germany.
The 12 pfenning on the left and the 40 pfenning in the middle are US and British occupation after WWII.
The green 5 Pfenning on the right is from 1889, the German Empire. It is the oldest in this collection. The cancelation here is very centered, so some will find it more appealing.
Hope you find it interesting.