I didn’t have much luck learn about these, but it looks like a cool trailer.

“British Military Sankey Land Rover BDR (Battle Damaged Repair Workshop) trailer. Very heavy duty high spec trailer…built to take to war behind Land Rover Defenders. Overun disc brakes, parking brake, pintle hitch, reverse stop, stabiliser bar, leveling legs. Fold out work bench, lockable parts storage. Perfect expedition trailer. Located Trinity County. Buyer to collect. 707 416 8765”

http://sfbay.craigslist.org/nby/cto/1848849920.html