Jusqu-a Airmail Markings- A Study Ian Mcqueen 〈TOP-RATED – 2027〉

McQueen highlights specific geographical "bottlenecks" where these markings were most prevalent: The Middle East Hubs:

: These markings are "auxiliary markings." They help postal historians trace complex air routes and identify where air service ended. Ian McQueen’s Definitive Study Jusqu-a Airmail Markings- A Study Ian McQueen

Are you looking for a specific Jusqu’à marking identified by Ian McQueen? Do you have a cover you believe is referenced in his study? Contact your local philatelic society or post a scan in the Airmail Collectors’ Club forum for authentication assistance. Jusqu-a Airmail Markings- A Study Ian McQueen