Trying to date a wheelset - Mavic 204S rims?

[TOMAS]

Trying to get intel on a wheelset which has Mavic 204S UB Control rims - i've searched what I can find online about these rims but very little

Anyone any ideas of when they were knocked out, where they sat in the Mavic rim hierarchy etc.

Any help much appreciated!

 

[jim haseltine]

UB indicated a special machined finish to the braking surfaces - supposedly to improve braking performance and was introduced in the mid-1990s from what I recall. Other than that I know nothing.