« Previous Letter Carriers Commemorative View Full Size All Images Honoring the 320,000 USPS Letter Carriers who deliver over 168 billion piece of mail each year. Tags 1980s OfficialFirstDay OneColor PostOfficeHistory Unaddressed Dates & Locations Aug. 30, 1989 Milwaukee, WI, US Related Covers Letter Carriers Commemorative Signing of the Constitution First Automated Mechanized Post Office … 21c Envelopes Gamm cachet Stockholmia 86 Louipex 83
