There is a collector of just about any graphic or printed matter you can think of, and I recently came across an interesting blog of Air Mail labels by “Evaldas” in Ireland.
His blog displays a fascinating and fast growing collection of International Airmail and Priority Mail Labels from all around the world including some of the most far-flung countries and places you could imagine.
There are some fascinating designs, including the stock standard “Par Avion” in Blue and white . If you search through the blog you will come across some in other colours, but those with blue seem to be the best.
I couldn’t resist putting the last image 2003 from Finland – as it’s such a lovely piece of design.