Article date: Feb 1963
Article title: Curves of constant width, one of which makes it possible to drill square holes
Mathematical Games column? Y
Book: 5. The Unexpected Hanging and Other Mathematical Diversions
Chapter: 18. Curves of Constant Width
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (29 October 2023):
I have seen this chapter and column side-by-side and they match.