When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I believe they are (late?) 1960's or early 1970's. I'm sorry, I can't give anything but my gut instinct (I'm into the Cold War U.S.A.F.). I have one like those along with an obviously later, sleeker, sturdier design I bought surplus in the early 1980's. I can look through pictures in old books, etc.; but that will take some time I don't have at the moment. When I can come up with something more definite, I will let you know (like that Hi-Altitude suit).
We can probably figure it out if you post clearer pictures of the engraved section at the bottom of the clipboard, as well as the white printed section.
We can probably figure it out if you post clearer pictures of the engraved section at the bottom of the clipboard, as well as the white printed section.