Very hard to say from the photos you posted.
The koftgary is definitely recent but the dagger can be older... much older. It is a rather frequent practice to apply koftgari on antique but otherwise mundane knives to make them more saleable. But then again, this looks to be genuine koftgari, and well made. So I don't think being recent makes it less genuine/valuable.
Other than that, the example looks good and made in the traditional way. The chiseld blade is almost unseen in recent production. So I don't think it is a fake. Early 20th century seems plausible to me albeit the blade can be significanly older.
Would definitely like it for my collection.
The recent scabbard has absolutely no relevance for assesing the blade but it is a nice extra.
PS: I managed to download and open the pdf file. Now that appears to be a recent dagger with a pattern welded and NOT WOOTZ blade. So, if the seller lies about this, ho much can you trust the rest? But then maybe I am wrong ...