Honing services, metal, precision, Industrial subcontractors, Metals, Machinery & Engineering, Polishing services for plastic, Deflashing and finishing services for plastic parts, Polishing and grinding of watch-cases, hands and springs, Polishing, buffing and burnishing services, mechanical, for metals, Metal surface treatment and machining contractors for the clock and watch industry, Superfinishing services for metals, Cases for clocks, watches and instruments