U.S. Scott 1055, the 2 cent Liberty issue horizontal coil stamp picturing Thomas Jefferson on an envelope with the corner card of the National Right To Work Committee in Fairfax, Virginia. Since the minimum per piece rate did not go above 2 cents until July 6, 1977, it is likely the cover was mailed after that date. The stamp has a "RIVERDALE MD" pre-cancel and there is an "ADDITIONAL POSTAGE PAID" hand stamp on the envelope indicating that the sender paid the amount needed above the 2 cents to cover the minimum per piece rate. Usages such as this can be difficult to locate as most were thrown in the trash.
U.S. Scott 1055 on Third-Class Non-Profit Organization Cover
Returns accepted for up to 30 days from the date of mailing, for any reason, as long as the item is returned in the same condition that it was sent.