Can you help identify this cover and tell me who Muller is?
(sorry if in wrong subforum)
What exactly is a Huber 300? ---I'd recently acquired this cover and was curious where I can find additional info. I have the full AAMC set, the Haitian Philatelic Society books 'Early Air Mail of Haiti' by Peter C. Jeannopoulos and 'Haiti's First Flights' by Barbara A. Levine as well as all of the pertinent PDFs and links here by Huber and Singley (elsewhere), So, who and where is Muller??