Punching Error: philatelic term for a punching deviation caused by error
Horizontal Punching: postage stamp with horizontal instead vertical punching caused by error
Inverted Punching: postage stamp with 180 degrees rotated horizontal punching caused by error
Double Punching: postage stamp with twice instead once punching caused by error
Double Punching One Invert-ed: postage stamp with twice (horizontal and inverted) instead once horizontal punching caused by error