This clock was presented to long-time employee Dr. J. W. (Warwick) Knowles on the occasion of his retirement from CRNL in 1985. Knowles was one of the “original” pioneers of the nuclear industry having joined the National Research Council (NRC) and worked in the Montreal Labs. before moving to Chalk River. At Chalk River he became a world-recognized expert in the high-precision measurement of high-energy gamma rays following the capture of neutrons in targets. The clock, which measures 26 cm in diameter, depicts the many X, gamma and beta ray experiments he carried out in his long career.
