Previous ImageNext Image First-Day Cover – Opening Day of Philadelphia’s New Municipal Airport on JUL 19, 1940 First-Day Cover – Opening Day of Philadelphia’s New Municipal Airport on JUL 19, 1940 Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on Pinterest (Opens in new window) Pinterest Click to email a link to a friend (Opens in new window) Email Click to print (Opens in new window) Print