“On vintage Shasta trailers the factory stamped a unique VIN number on each trailer's frame, near the tongue. You should be able to find the VIN number stamped into the curb-side (i.e., "door side") leg of the tongue frame, on the outside face (see the red outlined area in the photo below).
You should also find a small VIN plate welded to the inside face of the street-side leg of the tongue frame (the green outlined area in the photo above). If this is an un-restored trailer, these numbers on the frame may be obscured by rust, dirt and peeling paint. You may need to get up-close and use a flashlight to make out the digits.”
Remove the paint with paint remover. Do not use a grinder or a wire brush attachment on a drill. A hand wire brush will be safe so that you don’t unknowingly destroy the VIN stamped into the frame.
"I get that queasy how in the hell will this thing ever go back together feeling.” - PT