abstract |
The first lubricating oil composition of theninvention comprises a polyol ester (A) as a base oil, anspecific amount of a viscosity index improver (B) and anspecific amount of an anti-wear agent (C), and the secondnlubricating oil composition of the invention comprises anparaffinic hydrocarbon oil (F) having at least 30 carbonnatoms and a specific amount of a viscosity index improvern(B), so that these compositions exert effects that theynenable a life of watch battery to last long, they enablena watch to operate in the temperature range of -30 ton80°C with one kind of a lubricating oil, and they arenfree from change of properties over a long period of time.nThe third lubricating oil composition of the inventionncomprises an ether oil (G) as a base oil, a specificnamount of an anti-wear agent (C) comprising a neutralnphosphoric ester and/or a neutral phosphorous ester, andnan antioxidant (E), so that this composition is free fromnchange of properties over a long period of time and isnfavorable as a watch lubricating oil. The watch of theninvention is a watch having a movable portion for whichnat least one composition selected from the abovencompositions is used. |