Pre Vendôme Straps
Straps made between 1993 and 1997 are distinguished by the "fancy buckle" that is sewn into the strap.
The Mare Nostrum straps (for 22mm lugs) have considerably smaller buckles than their 24mm lug counterparts. It is worth noting that several contemporary Panerai watches, mostly 40mm models, have 22mm lugs, and so can be fitted with a Mare Nostrum strap.
Pre - Vendôme straps came in two basic materials, "kodiak" (a treated leather), and "vero squalo" (shark).
And if you ever wondered what a contemporary Panerai looked like on a pre-Vendome strap, well ..., thanks to BA for this great photo.