Manufacture of watches and clocks of all kind (including clocks of instrument panel), watch cases, frames and cabinets (including those in precious metals) of watchmaking
Manufacture of plate items in precious metals, in plated or in common metal covered with precious metals: flat ware, hollow ware, sets, personal care objects, writing sets, etc.
Manufacture of string instruments
Installation of secondary power supply systems (electrical generators)
Setting of monitoring systems and alarms against housebreakings
Wholesale trade of music instruments
Production of clocks
Electro-technical installation works at buildings
Restoration of buildings
Wholesale in clocks and ornaments
Repair of clocks and gems
Surfacing metals
Working by stock removal of metals
Assembling of elements of metallic structures, not made by the unit making the works
Building of transport and distribution lines for electricity
Building of lines and networks of telecommunication
Setting of electric cables and appliances
Setting of telecommunication systems and computer installations
Manufacture of projectors
Manufacture of metallic frames or framings for building
Production of forged pieces in metal for a third party