http://www.network54.com/Forum/353393/t ... -26+straps
I do not think the buckle in picture 2 is a real OEM Panerai screw in buckle.
Panerai does not make 24mm screw in buckles, and if the strap was 24 mm and the lug bars of the screw are showing the strap is either wrong or the buckle is not correct.
If the strap is 24/22 mms wide then it can be a Gen buckle but that would mean that the strap tapers to 21mms from 24.
Can you post a picture of the back of the buckle?