I found one truck that says MONARCH on the broken spring plank that goes across the bottom of it, but otherwise it looks like an All nation truck except the wheels are rib back. Don't have a mate for it though.
I discovered that to put brake shoes on the All Nation 2 spring trucks, you have to take them apart and file away the two nubs on the bottom of the side frame. They also use a fairly large spring that I cannot get back into the things so substituted PSC #356 instead. Rails Unlimited should have these to fit All Nation eventually also.