Umm actually, heres one of those dodgy things. The people at DJR reckon its the something to do with shape of the X in Helix that defines the year. They did tell me, but heck, I'm not that much of a boffin. We probably need pictures.
The 2002 has ****Vacation Club written on the Screen, The Scalextric one CLEAN UP AUSTRALIA. So thats 2001 maybe?