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Identified as PS Form 3575, Apr. 1987, *U.S. GPO: 1987--179-028
Image from eBay April 2023
Apr 1987
1758
2089
Contracts
Proposal for Mail Route
Unused form
1900s
A four page form to be completed when entering a proposal to carry mail on a mail route.
1759
731 PA
Article held for postage
Philadelphia PA
12/24/1909
Post card form used to notify address that a second class circular/paper/package is being held at the post office and requires postage. It has a "731" at the top of the reverse which is assumed to be the internal Philadelphia post office form identifier. This is a privately printed post card form prepared by the post office at Philadelphia PA. It is similar to USPOD Form 1543 or 3548.
1760
1510
Inquiry
Inquiry for Loss or Rifling of Mail Matter
For all domestic mail. Also for loss in foreign mails (for 3rd and 4th class offices). Also for rifling, damage, delay and wrong delivery of foreign mail.
1893 DLS
1956 ASW
Image of front, and envelope used to return to patron. Harvested from eBay 2023.