I saw your picture and thought "That is the trailer I won last Thursday!" turns out, it is real close but looking at the duct tape patterns, I don't think so. See below.
I bought an ugly rusty trailer because it has the brake with a shiny cap. Hopefully, that means maintenance was done and the brakes work rather than the cap got lost and they put a new one on to hold the rust in.
But, A1 to A2 id is the brake master, 8 lug rims and probably big composite tail lights on the A2. With just a frame on the front and 5 lug rims on the A1
A2 to A3 id gets more complicated because the only difference I can figure out between them is the offset hub to the axle and maybe the rim type, but not the lug count.
Hmm, I can't get the picture from GL to load. Oh well, it looks real close to the one posted above with the same markings and numbers.
I realized it was a bmp type picture and not thinking of a better way to convert it, I loaded it up to imageshack and then saved what they gave me which is ok for posting here.
