Jusqu-a Airmail Markings- A Study Ian Mcqueen Site

McQueen divided these markings into specific types, such as "mute" parallel bars, crosses, and explicit text-based stamps like "Jusqu’à Londres" (As far as London).

Many markings were only used at specific transit hubs for short periods. Jusqu-a Airmail Markings- A Study Ian McQueen

An airmail etiquette (blue "Par Avion" label) needed to be "canceled out" or qualified because the flight was unavailable for the remainder of the route. McQueen divided these markings into specific types, such

It elevates these "instructional" stamps from secondary marks to primary objects of study. such as "mute" parallel bars

It helps researchers understand why a letter may have taken weeks to arrive despite having airmail stamps.

Detailed visual catalogs of handstamps from around the world.