Originally Posted by Lakers4Life
It's a foot activated drop weight. Very similar to a Serrano.
Yep, our shop had one next to the Serrano...busted hydraulic? brake meant we had to 'e-a-s-e' the weight down to apply tension. Quite the one-legged workout!!!
That one looks really rough, BTW. Check the action on the pedal/weight arm. I'd be a bit surprised if the 'brake' action worked. Still, might be fun to mess with if the clamps work OK.