Dyson model numbers have never been entirely logical; nor do they tend to run in sequence. We have a Dyson Model Number Index
you can peruse if you want to brush up.
Some Dysons were never released (or never properly released)
though. The DC06 is such an example. The DC06 was actually built; it was a robotic vacuum cleaner. Apparently, it was briefly released but taken off the market due to its very high price tag (imagine that?)
. You can see a video of the DC06 in action here
. Rumour has it there is the odd one around still. If you have one, and want to sell it, get in touch with us.
The DC09 was never released at all. It was feared that this model name would cause confusion with the DC-9 aircraft. (What they really meant was they could not get high on Google with the term "DC09", and that's bad for marketing!)
The DC10, similarly, was never released. The DC-10 is also an aircraft. Too much potential confusion there they seem to have decided.
The DC13 was another model never made. The reason? Fear of bad luck it seems.
Here is what Dyson UK said about the DC09, the DC10 and the DC13's that were never made:
We never made a DC09 or DC10 as the names are more commonly associated with aerospace manufacturer McDonnell Douglas (now part of The Boeing Company). And, just in case, we avoided DC13.