Envelope with cut=out in front panel - is covered by backing sheet at rear for detachable self-adhesive reply label with sender address

摘要

The letter envelope has a cut-out in the top left hand corner of its front panel covered by a larger paper backing sheet. This has its perimeter secured to the rear of this panel and carries a detachable self-adhesive label the size of the cut-out. - This label, which has its front face flush with the panel front, has name, address and possibly references etc. of the user printed and/or written on it.