Aethalia mounts the mechanical hand-wound OISA Caliber 29-50 Cinque Ponti movement. The movement, of 100% Italian manufacture, features handmade Còtes de Genève machining on the bridges enclosing the gear train and Perlage machining, also handmade, on the mainplate.
Equipped with 19 jewels, it features a “Masselottes”-type time regulation, which is thus done through counterweights placed on the balance wheel, rather than through the classic regulating racket located on the balance bridge. The winding autonomy is guaranteed 60 hours, with a daily chronometric tolerance of +/- 10 seconds.