Hi boffingham,
That great little trailer is a Wa-Wa. It is a defunct Belgian caravan brand.
I agree with you, it is quite nifty. One of the earlier ones even had dual
wheels on independent axelettes [my coined word] with BIG rubber bands
providing the suspension action - as if it isn't unique enough already!
Look closely at your pic and you can see the dual wheels on the street
side of the caravan/TTT.
Here are three web sites I had booked marked about them. They are
Belgian or Dutch, but a translate bar soon pops up so you can
translate it into English easily.
http://www.wawacaravan.nl/
http://www.mvanmierlo.nl/wawa.htm
http://driveyouroldie.be/blog/evenement ... us-eik-be/
Hope this helps you with your plans.
Cheers,
Norm/mezmo
If you have a house - you have a hobby.