This is 2x high quality quick release spring bars that will fit any Cartier Santos-Dumont Small watch that has the code 4242 on the back of it such as the W2SA0012 (however it will fit any watch as long as it has the code 4242 on the back of it. The last two photos show what these spring bar look like when attached to the 4242 strap (the strap is not included).
I have given you photos of your spring bars 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.