I agree with the folding and stress tears. I’ve taken pics of old papers and at first glance looks good to me. It’s dingy enough. The stain, maybe a bug stain, looks good. The form’s fonts and style looks like that era as does the typing... ribboned typing and font... the shading of lighter/darker ink, the heavier ink from years of use inside the “a”, “A”, and “s”. Someone should definitely check out an old Royal typewriter.
nicotine i suspect having made one or two in my life.