The Corum Bubble watch — flaunting a large, round case and prominent domed crystal — made its debut in 2000 and wowed some segments of the watch enthusiast community with its radically unconventional design. Numerous and often colorful versions of that original model appeared throughout the early aughts, until eventually Corum, seeking more serious horological cred, opted to move away from the trendy Bubble to focus more on its core Admiral’s Cup and Golden Bridge collections.
Both new Bubble watches have 47-mm-diameter cases, water-resistant to 100 meters. The sapphire crystals (front and back) are treated with nonreflective coating and the hour and minute hands are rhodium-plated and enhanced with a Super-LumiNova that echoes the colors of the dials and case. Both are powered by the automatic Caliber Co 082, with a 42-hour power reserve, a 28,800-vph frequency, and a Corum-decorated rotor. The watches come on rubber-lined calf leather straps (brown for Drop, blue for the Sphere2) and PVD-coated steel tongue buckles. Each one is limited to 350 pieces.