Froggy55:
Thanks for the link! One of their trailers is 12 meter long, and may be the clue to the picture:
veldhuizen.nl/producten/trekker … -oplegger/
0
I’d say the one in the picture is about 6m long, or 8m at a pinch. The 12m version isn’t so unrealistic when you see how scaled down the whole structure is. Robert