1 & 4 are probably not stamps. I am without my catalogs right at the moment but would think a search of Roman States, Newfoundland, and Ceylon would locate the others
1 : listed by Michel as "Zulassungsmarke für Pakete" (parcel registration stamp) under Bohemia & Moravia,1943 Used in the concentration camp of Theresienstadt (now Terezin,Czech Republic) Most likely a reprint or a forgery
The original Theresienstadt stamps have been forged/reproduced many many times. It was a concentration camp stamp. There are specialists who collect material from concentration camps.
The third one seems "inspired" by the 1887 Newfoundland issue (Scott 48, Michel 37), while the last one may or may not be Ceylon from 1857 (Michel 10y, Stanley Gibbons 10).
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