The model number on the canisters starts with 116, but on the dust cup & on the power head of the smaller one, they are assigned numbers of 200 and 600 series. The Full Size Bagless is based off of a Panasonic design - see here: http://shop.panasonic.com/shop/model/MC-CL935
The more I look at the newer budget uprights the more I see TTI influence on them, particularly the place where the motor sits. This is the same TTI-motor type pack seen on a good number of the Hoover and Dirt Devil bagless machines.