Extension of route from St. Petersburg to Miami
National Airlines flew Air Mail (AM) 31 route, which included a stop in Fort Myers.
Postmarked: Fort Myers, Florida
Postmark date: July 16, 1937
Acc. no. 2025M.013.006
National Airlines flew Air Mail (AM) 31 route. It began service to Sarasota on August 4, 1937.
Postmarked: Sarasota, Florida
Postmark date: August 4, 1937
Acc. no. 2025M.013.007
