Wiki lists few trains (and other vehicles) like Bertie on the website, were these prototypes.
http://ttte.wikia.com/wiki/Minis?file=Mi...Bertie.png
I've never seen Bertie as part of any package before, or Duck, Clarabel,
http://ttte.wikia.com/wiki/Minis?file=Mi...Bertie.png
http://ttte.wikia.com/wiki/Minis?file=Mi...Bertie.png
I've never seen Bertie as part of any package before, or Duck, Clarabel,
http://ttte.wikia.com/wiki/Minis?file=Mi...Bertie.png