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PS: not sure what hinged/unginged mean so hoping you'll see them and tell me.
From Wikipedia
https://en.wikipedia.org/wiki/Stamp_hinge"In philately, stamp hinges are small, folded, transparent, rectangular pieces of paper coated with a mild gum. They are used by stamp collectors to affix postage stamps onto the pages of a stamp album."

Your albums are called "hingeless albums" because they have clear plastic mounts to hold the stamps, eliminating the need to use hinges to hold the stamps to the page. Removing a hinge from a stamp will leave a mark and sometimes damage the stamp. Many collectors prefer "unhinged" or "never hinged" or "MNH" (same thing).
Your albums are beautiful, and being "hingeless" albums, that is a good sign that the stamps are never hinged, but that is no guarantee. For, the collector could have purchased a stamp that was previously hinged from another collector. Mounting a hinged stamp in a hingeless album does not make the stamp unhinged. :-)
If you don't have any stamp tongs and know how to use them, best to keep the stamps how they are in the mounts. Don't take the stamps out of the mounts to look at the backs because you could leave a fingerprint on the gum, and that's almost as bad as a hinge. Yeah, we're picky that way. You can't buff off a fingerprint from a stamp like you can on a coin.
Thanks for posting the photos. I don't collect this area so I can't comment on the value, but they are sure nice to look at.