Bob
The Swiss trailer looks like a copy of the WW2 jeep trailers. Do a google search of M100 and M416 trailers, Those are the military # for those trailers in the US and the M100 is the Canadian equal (iirc) to the M416.
I have a M762 trailer (flatbed version of the M416). Nice size little trailer, but I also have a 3/4T British Sankey trailer that has me spoiled.... lots of little extras like surge (over run) brakes, a jockey wheel, rear stabilizers legs and a wonderfully balanced tongue ( in comparison to the M762), for moving it around empty. The drawback is that they use LR lug pattern wheels... unless you have LRs
M416 rims are cheap and everywhere, and are the same as used on M151 Jeeps.
Just a littte more info and options for thought.
Dave Dunn
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The Trojan Horse... the 1st Pinz used to covertly carry troops into battle .
ATL Pinzgauer XM 718K TUM(HD) 6x6 FFR (aka The Green Grail)