2 prints - 230 years old?

Bought these yesterday and as you can see on the back $6 ea. Prints are appox 8.5” X 7” Company is very searchable
https://amblerartgroup.com/pages/about-us

So is the book.
https://babel.hathitrust.org/cgi/pt?id=njp.32101075140432;view=2up;seq=108;skin=mobile

Every thing about these says they are original to me. Knowing that the company also sold reproductions, as in this one clearly stating, all be it difficult to read the label, that it is a repro. They dont even fill in the circa_____ . Priced at $399 I think is hilarious for a reproduction IMHO.
https://zetsvintagestore.com/store/...adbourne-in-the-county-of-kent-uk-art-framed/

If someone can confirm in their opinion they are true antiques and also, if you look at the actual book in the link I provided, most every page is foxing and or is it mold(spotting)? If these are indeed original should I have them professionally cleaned or reframed. They dont seem to mind the spotting in the online book. If real, these will be a keeper.

Thank you for looking.

 

They do look like what they're supposed to be. Antique book plates.

Debora