Aviation related posters from a book....post-war?

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I got these several years ago, they were originally in a book I assume by the fact that there are page numbers on the bottom. I've always assumed it was a post-war publication, does anyone recognize what it may be? They are very well done and it feels like it's older paper. Any suggestions on them would be greatly appreciated!

Thanks in advance.

Eric

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[CollectRussia]

Looks like the sort of advertisements found in wartime trade & technical publications.

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ahhh....of course! That makes sense, it never even crossed my mind!

Thanks!

Eric