Jusqu-a Airmail Markings- A Study Ian Mcqueen Access

Without Ian McQueen’s systematic study, these covers would be mere curiosities—interesting but indecipherable. With his study in hand, the collector becomes a detective, tracing a letter’s path from a Parisian boulevard to an African lagoon, then onward by ship to a Brazilian port.

McQueen provides detailed listings for over 150 distinct markings, noting periods of use, rarity, and known covers. Jusqu-a Airmail Markings- A Study Ian McQueen

McQueen intentionally focused on handstamps that explicitly indicated a restricted air service, along with airmail cancels that marked the end of the flown portion. Not every routing marking qualifies. Without Ian McQueen’s systematic study, these covers would

However, continuous international flight networks did not exist. An aircraft might fly a letter from London to Cairo, but no further. Alternatively, a sender might pay an incorrect or insufficient fee for an all-the-way air transit. Jusqu'a Airmail Markings. (A Study) - AbeBooks An aircraft might fly a letter from London

They indicated that the sender had paid the premium airmail surcharge for the airborne portion of the route, while the remaining journey was covered by standard postal rates.