The United States Postal Service unveiled new stamps in light of 250 years of service to the country during a ceremony at the Philadelphia Main Post Office Wednesday morning. Back in 1775, four USPS post offices were open across the nation including locations in Philadelphia, Bristol, Chester and Wilmington. The new stamps depict a mail carrier’s daily routine through the different seasons in a year. Cartoonist Chris Ware created the artwork and Antonio Alcalá with the USPS helped in the design. #250thanniversary #usps #postalservice #postoffice #uspostalservice #stamps #philadelphia #philly #bristol #chester #wilmington #pennsylvania #delaware