Where can I find the vehicle ID number on a ledger trailer

Check on, under, around the tongue for any numbers stamped in metal.

Also look for any info sheets on back of cabinet doors, closets, inside drawers.
(Shot in the dark BUT they may still exist)

Made by American Travel Systems (1989-2000)
1990 was first year they had a 3 axle model. And first year for slide out was 1996 but i can find any models with 2 slide outs.

Here is some info via NADA......LINK

Good luck!