FIELD: watches and other time measuring instruments.
SUBSTANCE: invention relates to external parts for clock articles. System for producing outer part of clock comprises fastener therewith, installed with possibility of rotation along first axis, and intended to receive at least one blank part, device for mechanical processing, containing abrasive agents, installed with possibility of rotation along second axis and intended for mechanical treatment of said at least one blank to form first curvature of its surface. Device for machining additionally comprises means of movement of said second axis to allow its fitting to move along guide for selective formation of surface of second curvature on said at least one blank. Said first axis and said second axis located perpendicular to so that machining lines intersect. External part (3, 23, 43, 63, 83, 103), comprises top surface (82, 102) and lower surface (84, 104), characterised by that at least one surface of outer part is curved and has differing from each other lengthwise curvature and transverse curvature, at that at least one of said lengthwise and crosswise curvature is asymmetric. Clock has said external part.
EFFECT: broader technological capabilities.
13 cl, 10 dwg
