That would probably be my old Silver King. I bought it used from
a salesman who swore it would "suck the dirt out of an electrolux"
and then proceeded to prove it. It will also suck the parts right
off of a printed circuit board if you're not careful. If I use
a crevice tool and put it near a neon lamp, the lamp lights from
the ionization of the air flowing past at high speed.

The filter is a simple 12 1/2" piece of filter paper.

wrote:
Fewest fragile parts/accesories, best suction, best thout
design.

thanks

gary