For the last 31 years, yes. Vari-X III, VX-III, VX-3, VX-3i. Still have, and use for hunting, at least one example of each.
On a light mountain rifle it's still my fav--especially with the B&C reticle.
Also, as TOM noted, they have had a 36mm objective for decades.
I only have six 2.5-8 x 36mm's. They age from 98 up, including 3I's. No problems.
My oldest Leupys are from the 80's but they are 2-7's and 3x9's. I did have an 89 model get sticky on windage so I sent it back. One out of about 30 isn't bad performance.
