Limited Edition of 99 Pieces. Louis Erard Watch Excellence Excellence Main Guilloche Limited Edition 66237AA52.BVA34. Louis Erard continues its odyssey in artistic craftwork. Still in a limited edition and with the same contemporary take on the tradition. Each dial is made piece by piece by hand guilloche in Switzerland, with an attention to detail normally reserved for the absolute top of the range. The 3D checked pattern catches the eye like a trompe l oeil, an unusual pattern on this type of finish, somewhat breaking the codes of the hand guilloche dial. The effect is reinforced by the black varnish, used to cover the dial before the guilloche, and the final rhodium plating that gives a silver patina to the brass exposed by the chisel.