Dear Ariel.
No one is arguing that the very old papers. But no one can say when the papers were glued (50 years ago or 100 years ago). And most importantly, why ...
In addition, you're kind of writing in Russian forum that besides numbers (not necessarily the date) on pieces of paper are many other words that you no one could translate into English
So do not be in such a hurry, saying that these chooras 19th century.