The first is a classic Panerai leather strap.
The Bucke says it is fitted in recent references Panerai.
The second is the version of "vintage" used leather fitted on 56x series.
But to understand if they are gen or not you see the quality of the skin and th incisions by the fire.
Looking at the pictures for me here's rep.
I've a 564 and the strap is the same.
Same applies to the black leather.
But , maybe I wrong
Junio M.