Jusqu-a Airmail Markings- A Study Ian Mcqueen

While not a price list, McQueen’s scarcity ratings (Rare, Very Scarce, Common) are the basis for all modern pricing. A cover with a Jusqu’à Saigon marking (rated ‘Extremely Rare’ by McQueen) recently sold at a David Feldman auction for over €4,000. A common Jusqu’à Natal on a late 1930s cover might bring $150-$300.

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. Jusqu-a Airmail Markings- A Study Ian McQueen

The study provides an inventory of known handstamps organized by country of origin, where most of these marks were applied. While not a price list, McQueen’s scarcity ratings

McQueen’s original study (typically found as a series of articles bound into a booklet or published in journals like The Airpost Journal ) is divided into three primary sections. For the modern collector, understanding these sections is key to using the text. An airmail etiquette (blue "Par Avion" label) needed

If you own a copy of Ian McQueen’s study or possess a cover bearing a "Jusqu’a" marking, philatelic libraries encourage you to submit scans to the Aerophilately Research Group to help update and preserve this vital area of postal history.