Jusqu-a Airmail Markings- A Study Ian Mcqueen -

Before Ian McQueen published his specialized study, information on these markings was scattered and anecdotal. McQueen provided a systematic framework for identifying and categorizing these strikes.

For decades, collectors struggled to categorize these distinct handstamps and manuscript markings. The definitive breakthrough came with the publication of the seminal book, Jusqu'à Airmail Markings , authored by renowned philatelist Ian McQueen. This article provides an in-depth analysis of the "Jusqu'à" phenomenon, exploring McQueen's research, the historical context of the Universal Postal Union (UPU) regulations, and the classification of these highly collectible markings. What are "Jusqu’à" Airmail Markings? Jusqu-a Airmail Markings- A Study Ian McQueen