This United States Postal Service National Air Mail Week cover from May 21, 1938, was canceled at the Thurmont Post Office and signed by Thurmont Post Master Earl T. Kelbaugh. The envelope celebrates The Old Match House on West Main Street. Jacob Weller manufactured the first Friction Matches manufactured in the United States at this location in 1825.

Not in bad shape for being 90 years old. Most Post Offices issued Air Mail Week covers and they are very collectable little slices of local history.