The Indian state stamp is Hyderabad. The stamp on the upper right is a Bulgarian Postal Tax stamp issued in 1941. The large stamp on the left that looks as if it has Greek text is unknown to me but I suspect it is not Greece or perhaps a Greek cinderella of some type. If I can't find it, perhaps someone else can help.
The last one is a semi-postal Bulgarian stamp. It comes from a 1941 set of three, issued to help raise money for the construction of a sanatorium on the Black Sea. This is the low value stamp, while the two others' value is two and five leva respectively.