, this book is indispensable. While it is a technical "study" rather than a narrative history, McQueen’s clear organization makes it accessible for anyone trying to understand the journey of a specific airmail cover. It remains the "gold standard" for this niche, often cited in auction catalogs and expertizing certificates.
It elevates these "instructional" stamps from secondary marks to primary objects of study. Jusqu-a Airmail Markings- A Study Ian McQueen
McQueen mapped every known "Jusqu’a" point active between 1928 and 1939. Key hubs included: , this book is indispensable