A timepiece part includes: a substrate; and a first coating configured from a material containing cobalt as a primary component, and 26 mass% to 30 mass% of Cr, and 5 mass% to 7 mass% of Mo. The first coating has an average signal intensity of oxygen of 0 counts/sec to 150 counts/sec as measured by SIMS relative to a 1.0 µm-thick reference film of a composition containing Co: 62.8 mass%, Cr: 28.2 mass%, Mo: 6.0 mass%, C: 1.5 mass%, and Ar: 1.5 mass%.