I picked up a load of vintage blue prints at a estate sale. Everything from machine/aviation parts to a 1948 Mid Century Modern Solar house one.

Anyway I’ve learned at these auction estate sales that Sinclair stuff is pretty popular.

Use these for wall covering. A back drop for Sinclair posters signs or clocks.

The two front sheets have stains in upper left corner. Shown in close ups.

The rest are clean but do have those bends. They are large at 32”x21.5”.