Postal Bulletin 22208 > Information Desk > Philately > Stamp Announcement Correction: Marine One(Express Mail)
In the article “Stamp Announcement 07-21: Marine One (Express Mail) Stamp” in Postal Bulletin 22206 (05-10-07), on page 124, the technical details state that the manufacturing process for this stamp is offset/intaglio.
Due to production changes, the manufacturing process will be offset with microprinting “USPS.” Consequently, the plate numbers are now “S11111.”
— Stamp Services, Government Relations, 6-7-07