This seems like a variation on the old story about Steinmetz, the Wizard of Schenectady, making a chalk mark on a generator at a Ford plant. Which seems to be a

This seems like a variation on the old story about Steinmetz, the Wizard of Schenectady, making a chalk mark on a generator at a Ford plant. Which seems to be a true story, although often not attributed. The punchline to this one has always been Steinmetz's itemized bill, of $1 to make the chalk mark and $9,999 to know where to make it.