PURPOSE: To operate the calendar mechanism of a wrist watch in good order without oiling for a long time, by forming a coating using a specific composition comprising an organometallic compound having a solid lubricating agent dispersed on parts forming the calendar mechanism of a wrist watch.

CONSTITUTION: A composition in which an organometallic compound[e.g., Al (OC3H7)3 or CH3Si (OCH3)3]and a solid lubricating agent[e.g., MoS2 or (CF)n]are dissolved (or dispersed) in an organic solvent is used. The above- mentioned composition is applied on the entire surface or the mutual sliding part of parts constituting the calendar mechanism of a calendar diaplay wrist watch (a data indicator, a date indicator movement control lever, a day indicator a day indicator movement control lever), and then the parts coated are heat-treated for about 5W100min at about 60W250°C. Thus, the coating is formed on the surface of parts constituting the calendar mechanism of a wrist watch.