Trying to shed some more light on these imperf stamps. Catalogue mentions imper varieties as proofs. However, it is my understanding that it is highly unlikely to come across a used proof.
First stamp, I suspect, is a regular postage due stamp with trimmed perforations.
The second, is most likely a stationary cutout. The paper is rougher, slightly thicker, and darker than the regular stamp. I would assume that there were stationaries/wrappers issued with this design, as it was also used for postal cards.
The fourth, Ned Indi stamp, can be a proof, but the paper is also rougher, slightly thicker, and darker than the regular stamp. Does anyone know if this design was used for stationaries/wrappers?
The third stamp is a mystery to me. The paper is as fine, thin, and white as the regular stamp. There are plenty of margins left to rule out trimmed perfs. However, it is used, which rules out a proof. Any thoughts?

