the picture you've posted is of an 'Open Pro', this isn't the same rim as the earlier and narrower 'Open'. SUP is just the process (Soude Usine Process) and remained the same for the Open Pro and other Mavic rims. which one do you want, the one in the photo or the 'Open' SUP?
I have the 'Open' in decent nick, it's seen some miles but has plenty left and isn't concave or have any splits etc. it's attached to a Shimano 600/Ultegra hub though that spins up fine. SS spokes all in good order
£29 gets the whole wheel posted to your door.
PM with an email for piccies if you're interested