This is an authentic Cartier Santos 100 XL black alligator leather watch strap that is in good used condition with some marks to the back of it. This strap will fit Cartier Santos watch models 2656 and 2774. Please make sure your watch has the code 2656 or 2774 on the back of it or this will not fit your watch.
Your watch strap is 23mm wide where it connects to your watch and is 21mm wide where it connects to your buckle. Each strap part is 11.5cm long.
I have given you photos of your watch strap from every angle. Please use them to add to this description.
If you are not sure if this will fit your watch or if you have any other questions then message me. I'm here to help you.