Few fashion motifs are as recognizable as Ralph Lauren’s American flag sweater. The designer, who has spent his illustrious, nearly 60-year career transforming Americana into a global lifestyle brand, is now the first individual to curate an official stamp collection in collaboration with the United States Postal Service as part of the country’s 250th anniversary celebrations . The “American Icons” commemorative collection features 13 photographs selected from the legendary designer’s archives that embody the layered fabric of the nation and represent the nation’s “shared values” that have defined the American experience, according to a press release. Ralph Lauren’s American flag sweater will be included in the collection. Ralph Lauren The collection features recognizable landmarks, including NYC’s own Empire State Building.…