Yeah, that makes a lot more sense. Thinking about it more it would be surprising to me if a commercial artist or draftsperson worked on this document and did no

Yeah, that makes a lot more sense. Thinking about it more it would be surprising to me if a commercial artist or draftsperson worked on this document and did nothing but the header lettering... there's a reason technical reports from this period with hand lettering or diagrams usually also have an illustrated cover. It's in for a penny, in for a pound on having a commercial artist involved.