Old forgery

The added examples of this type contain old forgery.

Wouldn't you think that pointing out the specific entry would be a better idea?

Latvia 50 rubli 1919 Serija 018983 A, Serija 051880 A

So 

Katz Auction 132 Lot 581 - 17 Jul 2024

Katz Auction 97 Lot 1163 - 7 Oct 2023

For my own curiosity, what makes them stand out as fakes? I couldn't really see any real differences.

You can go to the example list (LINK) and click on the X buttons on the right and request a deletion providing your reasoning in the bottom field on the request form.

The first one is described as a Forgery.  “This particular banknote is a forgery, which means it was illegally printed or altered to resemble genuine currency. In 1919”