Are These Airmail Envelope Common?

I came across these airmail covers form the 1940's - 50's and not sure if these are common. The first one has the bar crossing over the corners of the envelopes at bottom left and top right. The second one has the bars angled the other way and the last one has colored bars of alternating different lengths.

The livery on these airmail covers, are referred to as "Chevrons"

They come in a vast array, depending on whom produced them.
I would be ignorant of any Govt Issues.

These designs would make a fascinating collection.

". . .are referred to as "Chevrons""

Another name for them is "lozenge"

3193zd, I believe you did not get your question answered? Yes, these were common in their time. As a matter of fact, some of them were nothing more than a sheet with a stamp already imprinted.
The reason the chevrons are of a different length is that they were printed separately. And if the presses were not fed properly you get this sort of effect. Same as a stamp where one of the colors is off,


Peter

Thanks Peter! I think I have these confused with envelopes printed by the BEP with embossed stamps on them. Those would need to be of a specific style.

The envelopes in the OP were privately produced. Minimum standards for the border were provided by the POD and the actual design was left to the judgement of the manufacturer.

The BEP did not produce any envelopes with stamps embossed on them, they were produced by a private manufacturer under government contract. Those envelopes are often referred to as government printed.

The borders on government printed air mail envelopes were printed separately from the stamp impression. The early borderless versions were merely the stamped envelope in use with the border left off which allowed for faster production to meet the demands resulting from the war.

Thanks Bill! Always learning!

I understand that they were common at that time, but are they now common to collectors ?
I haven't seen them in any offers.

Well, yes Sleepy, I have to agree with you. I also have looked through hundreds of airmail covers for sale and these stood out. The middle one I have seen a few times I admit but the other two no.

The Canal Zone Postal Service is no longer, and the US Postal Service does not offer an Air Mail service any longer, so nobody produces air mail envelopes for use in the US or the Canal Zone. As Canal Zone postal history items they are not rare.

Thanks Smauggie!