This is an authentic used Omega NATO blue and grey watch strap that comes complete with the original buckle. It is Omega part number CWZ007891 and will fit a watch with lugs of 21mm. This strap is used so there are some scratches to the metal parts. Please see the photos I have given you.
The strap is security etched "CWZ007886 50 GJC Stainless Steel" and the underside of the buckle is security etched "Stainless Steel STZ001885 11 IJB"
I have given you photos of your OMEGA watch strap from every angle. Please use them to add to this description.
If you have any questions then please contact me at Sales@TheWatchLink.co.uk. I'm here to help you.