“Separation” is the general term used to describe methods used to separate postage stamps. The three standard forms currently in use are perforation, roulette, and die-cutting. These methods are done during the postage stamp production process, after printing. Sometimes these methods are done on-press or sometimes as a separate step. The earliest issues such British-India 4 annas, half anna and one anna did not have any means provided for separation as seen in the image below. The stamps were probably cut apart with scissors or folded and torn.