Two political events, the resignation of President Richard Nixon and the withdrawal of the last American personnel from Vietnam, marked the mid-1970s. And as the American people sought a secure foundation on the domestic and international stages, American popular culture produced two legendary series: During 1975 Steven Spielberg released his terrifying film "Jaws" and NBC's long-lived television series "Saturday Night Live" first aired.
The United States Postal Service experimented with self-adhesive stamps during this period. The issue first incorporating this new product was the 10-cent 1974 "Peace on Earth" Christmas stamp. The USPS, continuing its celebration of the bicentennial of the American Revolution, released several more commemorative stamps related to that era. These included a set for the First Continental Congress and single stamps commemorating the 200th anniversaries of the Battles of Lexington-Concord and Bunker Hill.