As theres no handles on the corners and I think no shocks, Id say its a very rare Australian Army WW11 trailer.
I thing its called a mark 3 or something and may have been made by GMH.
It is worth quite a lot in that condition as is - do not mess with it!
The tie down rails around the trailer or the brush guards off the mudguards? - which make excellent steps for when your reaching in.
The little loop/hooks are for the elastic cord on the canvas top.
Its nice that you can drop the tailgate and leave the canvas and frame in place.
As for brakes...
This thing has got 10" of independant suspension travel, and the fancy assymetric link design steers when you hit a bump.
You know when you hit a bump, you feel the trailer pull a little on the car? A Track wont do that.
Ive towed a Track over 2000km now, and I find myself deliberatly running...
Here, that is worth far more to a collector, than to someone who wants a cheep camper trailer.
As someone who owns 2 Ford GPWs - a 1942 and a 1944, It breaks my heart to see an original Bantam trailer butchered.
Please, do someone a favour, and if you dont intend on restoring it, leave...
So, 10 years after visiting the factory, I finally got myself a genuine Track trailer. A Track Tactical. Got 2 of em actually - they were on special.
They were made for the Royal Australian Air Force.
They are a 6 x 4 , fully galvinised, with tarps, over ride brakes and a park brake, 3 new tyres...
Thinking about this has just reminded me of something.
Why is everyone so fasinated with airbags these days?
I worked on road trains for a while, and they had enough problems with their airbags, and valves, and they only ran on-road.
The next trailer I build will use adjustable coil-overs...
Another piece of advice......"build it... and they will come!"
I built mine on the cheep of course(thats why its Landcruiser and Hilux and leaf springs - from work), but there is enough of a market, even in Australia, to support several "premium" camper trailer (tent trailer) manufacturers...
Not sure how "prototype" you intend to go with the suspension, but set ups similar to this are easily availible at any trailer supply shop, here - ready to weld on.
I would turn the shocks 90', tho, across the chassis.
And definatly add a sway bar.
Yes, my override or surge brakes are hydraulic - in the 1st pic I posted, you can just make out a Hilux spinle and stone guard. I pressed then welded the spindes onto an axle I turned to suit, as it uses Hilux front disks/calipers, wheel bearings, seals, F/W hubs etc. The brakes are...
Heres another 1 for free, having the shocks behind the axle like that means that mud and sand, etc goes up under the stone shield - and stays there for longer than youd think. I think people put the shocks behind the axle like that because it looks right, and looks like they will be protected...