Back down here in SoCal on business. At least I found another trailer and this one is a M416. Sorry no photos, I went an looked at it in the dark. I put a deposit on this one so it wouldn't be sold out from under me too. Anyway, I think I'm going to buy it because it is very straight and there is very little rust. It has a few modifications done to it during rebuild by some P.O. 2" ball coupler mount and a very well done tail gate seem to be the big changes. Searching the net this morning I found info about the B1. This trailer has the frame mounted lifting hoops like a rare B1. Most of the other B1 items are missing, no surge brakes and no gas can mounts and the wheels are standard M416. Owner only knows it as a military trailer so no help there. Going out to see it again this moring in the day light and record the numbers and get a few photos. Check back and help me I.D. this thing. I will include photos and the price.