US Special Delivery Stamps 1885-1971 - Stamp Collecting World
www.stamp-collecting-world.com › usspecialdeliveryUS Special Delivery service was established by an Act of Congress on March 3, 1885. At first, this service was only made available in towns with a population of 4,000 or more. An Act of Congress on August 4, 1886, however, extended the new service to ALL post offices. This service, paid for by additional definitive postage stamps or special delivery stamps, was established for the urgent delivery of letters and packets, in less time than by standard first class mail service.
U.S. Special Delivery (postal service) - Wikipedia
en.wikipedia.org › wiki › UU.S. Special Delivery was a postal service paid for with additional postage for urgent letters and postal packets which are delivered in less time than by standard or first class mail service. Its meaning is different and separate from express mail delivery service. Essentially it meant that a postal packet was delivered from a post office to the addressee immediately once it arrived at the post office responsible for delivering it, rather than waiting for the next regular delivery to the addres