All Common Overprints Or Are Some More Interesting?

Hello,

here I show some stamps I had some time in my duplicates. Usually I don't keep stamps where I don't collect the area or topic, so I just give them away from time to time. Of course I want to know what stamps I have before I do that, so I show some overprints here, as overprints are always difficult to identify or find in catalogues.

Are there any overprints here where I should have a closer look?

I think about the double overprint (red and black) of the 15 Filler, the different letters in the Palestine overprints, or especially the blue "10" stamp with arabic text. (I included the Colombia "provisional" as I was not sure if the box cancel could also have some meaning similar to an overprint).

So I think I will keep them all :).

If this is not an easy identification job of mostly common overprints, I will have to learn more about them.

They must be difficult! Three days on this site without a response, must be a record!

They are all common overprints.the egyptian crown overprints have value when they are inverted or doubled;like most overprints.The Colombian stamp is not overprinted;its printed that way.The only interesting one is the Persian stamp of 1902 Scott no. 211 cat around 20$
used.

thank you very much!