Help ID The Value Of Some French Stamps That I Inherited From My Uncle

Can some of you help me ID and value some of these French Stamps?

I am cautiously optimistic to find out if the bottom left hand corner stamp on the page is the FRANCE Sc. #87 rare used stamp (Prussian blue) in color

Thank you

The condition of these stamps is very poor. And value is based on condition, condition, condition.

It, almost, is impossible to identify the exact colour of a stamp from a scanned or photographed image posted on a website. The perceived colour depends on many factors. To top it off, Scott colour definitions may differ from those of Maury and Yvert that are the standard for these French issues, and may create more confusion.

If you are hoping for someone to identify that stamp as the Prussian blue stamp, you might want to provide a clear scan of only that stamp.

I'm afraid that these are stamps commonly found in old albums, and worth pennies. You should be enthusiastically pessimistic about your 1c stamp - it's not the Prussian blue.

Are you looking for this stamp?

https://www.spink.com/lot/18054000117

Link provided earlier by GeoffHa.

Generally speaking, it would be extremely unusual to find a rare stamp on an approval book page along with a large group of "penny" value stamps. On a different note, there is a lot of soiling on this page.

Thank you all for your feedback, much appreciated.

I wish you all a Happy and Healthy New Year.