[73ClassicCoach]

Included in some of the documents I found in my coach are two blueprint drawings that I assume  are  hand drawn (originals drawn with a drafting arm on a drafting table then scanned and printed on a large format printer as opposed to being CAD drawn). I thought these  were pretty neat, they match my coach very accurately and have nice detail. Has anyone seen similar drawings or know anything about them. I assume that maybe they came with each coach when it was bought new from the factory as part of the owners documents but that is purely speculation. Anyone else find something like these?