I got an 825 recently... its a strange vac. ill post pics.
The 825 is a little odd. theres a 3 way switch on the handle. Its got low speed, high speed, and off positions. It is very streamlined... it was a big change in design from all earlier models... handle switches positions with no lever and just a pull down or a push up will change its position, all ball bearings... headlight that has a switch... Pretty fancy. Pics soon ill show some of the motor, inside of it. and the outside.And the switch.