The old Westinghouse Epoch 1's releveled with the brake set...

I don't know of any 1200's that haven't been modded, but I remember them. Load weighing had to be spot on...Every one of those old single or dual speed AC's I've seen stopped on the brake, and a lot of the old Otis relay stuff had a brake "Relaxing" circuit, for the final leveling...

It Don't mean a thing if it aint got that swing.

Cool, Free, Johnny Smith courtesy of NPR..HERE
http://www.npr.org/ramfiles/asc/asc25.smith.asx