By nature, each of the 15 Hastroid Rainbow timepieces will be unique and exclusive, as they are the fruit of meticulous work by artisans skilled in an art technique which requires inordinate dexterity. In addition to the precision required in this work carried out by hand, there is also the technical expertise involved in cutting entirely using a laser. The grille onto which the colours are applied is coloured using tinted Zapon lacquer.

Zapon is a premium single-component lacquer mainly used to provide long-term protection for dials which have undergone galvanic treatment. Applying the lacquer using a pressurised process requires great skill.

Consequently, the dial on each of the 15 pieces in the Hastroid Rainbow Limited Edition collection is worked on individually by hand by Yan Patriarca, lacquering expert at MD’Art SA. In the words of this specialist in the art: “Depending on the desired final effect, it is possible to change this product by giving it a satin-finished or a mat look, tinting it translucently using dyes, pigments or even with flakes of metal or mother of pearl”