Lot 51089 – 1924 (May 2 – Jun 9) First Experimental Flight Service Belfast-Liverpool, collection of 16 covers

1924 (May 2 – Jun 9) First Experimental Flight Service Belfast-Liverpool, collection of 16 covers incl. four May 2nd first flight, May 3rd second service (2, one signed by pilot Alan J. Cobham), May 6th, May 8th, May 10th, May 12th, May 13th (3, one also flown London-Paris, one also flown Croydon-Cologne and one also flown London-Amsterdam), May 26th and Jun 9th (with « NO FLIGHT… » hs), some with 1924 British Empire Exhibition frankings, fine