Some old drafting tools: An electric eraser (I wore out three of them in twenty years) and a couple of horsehair brushes, one with years of graphite and one unused.
Drawing the foundation plan for a loading dock in Watsonville the old fashioned way.
All my old drafting tools, and some I've collected, have found their way to the tool museum.
The computer and software have made it easy to produce clean, crisp and clear drawings. Curves are easy! No more graphite or erasure crumbs and debilitating back problems.
Here's a framing plan for a unit at the Post Ranch in Big Sur.