Limited Edition of 77 pieces.åÊ Perrelet Watch First Class Double Rotor 20th Anniversary Limited Edition. A3050/1.åÊ Known as a pioneer and pillar of the watch making industry, Perrelet are behind some of the most visually stunning and technically proficient timepieces in the industry. The Perrelet First Class Double Rotor 20th Anniversary Limited Edition collection was designed especially to celebrate the birthday of its double rotor invention, a novelty that brought the brand into the forefront of design ingenuity.åÊ Defined by its double rotor that twirls captivatingly across the intricate skeletonised dial, this Perrelet 20thåÊAnniversary Limited Edition watch impresses with a 42.5mm 18 carat rose gold case that embraces the P-481 movement. Alongside the skeletonised dial is a crisp white outer rim decorated with a guilloche d̩cor while the sleek indices and hands bring a subtle touch of sophistication to the piece. To complete the watch, a classic brown alligator leather strap is added alongside a matching 18 carat rose gold buckle.