U.S. Scott 807 3 cent Prexie/Prexy issue picturing Thomas Jefferson post marked with both an Oakland, California duplex cancel and a slogan cancel (Buy Defense Savings Bonds and Stamps) dated January 26, 1942. The cover was mailed from Oakland to Steels Pansy Gardens in Portland, Oregon. Evidently, the cover was mailed without postage, as it is stamped "RETURNED FOR POSTAGE" which was crossed out when the 3 cent Prexie was added and the second cancel applied.
U.S. Scott 807 on 1942 Oakland, California McDonnel Nursery Ad 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.