When I went to work as a design draughtsman in 1989, the drawing office still had about 25 drawing boards, and about 15 CAD terminals. Old drawings, which were not on the CAD system were manually altered. There was still all the old tackle being used, beam compasses, electric erasers etc, and all the draughtsmen had their own fancy drawing sets. One or two used lining pens, but the majority used Rotring pens ( later Pentel ). I spent the first year redrawing selected manual paper drawings onto the CAD system, and as the older guys retired, - mostly early, as they ween't prepared to move to CAD, the drawing boards did as well. All the old gear was sold off ( I seem to remember the professional drawing boards going for £25 ). Within 10 years we went from paper drawings to full 3-D CAD operation - at that time we were doing things on 3-D that even IBM weren't teaching ( the other firm that were doing advanced 3D stuff was Black & Decker ). Sadly the technology advanced so quickly, we couldn't afford to keep up to date...............
Dave