Jusqu-a Airmail Markings- A Study Ian Mcqueen -

McQueen divided Jusqu’à markings into four operational zones:

McQueen's contributions continued well into the 21st century, with later volumes like the Airmail Directional Handstamps Supplement published as recently as 2007. Today, his books are highly sought-after in the secondary market by specialists in United Kingdom philately and international airmail history. Jusqu'a Airmail Markings. (A Study) by MCQUEEN Ian Jusqu-a Airmail Markings- A Study Ian McQueen