the next step of the method fig1 consists in electroforming the second element 10 by galvanic deposition of a second metal in the aperture or apertures of the new resin mould 7 b by carefully choosing the two metals used in the method those skilled in the art may give the bimetal part the desired aesthetic or mechanical properties in this context u201c metals u201d of course includes metal alloys typically the second metal will be chosen from among the group that includes nickel copper gold silver nickel iron and nickel phosphorus those skilled in the art will understand that the present invention is not limited to decorative applications the function of a first element made of a first metal which is inserted into a second element made of a second metal may also be a mechanical or tribological function by way of example it is possible to make metal watch hands that have an insert made of a very dense material located behind the hand this insert is used as counterweight for the hand index according to a particular embodiment a nickel hand density 8 9 could for example have a large gold insert density 19 3 as counterweight it should be specified that an insert to be used as counterweight would preferably be very thick more than approximately 100 microns so that its weight is sufficient to have the desired effect once the second element 10 has been electroformed it may be necessary to level its top face by lapping and polishing depending upon the solidity of.