Is There Something Missing from the Antikythera Mechanism? Was It a Mechanical Planetarium–Positioner? Or a Luni-Solar Time Calculator Device? Reconstructing the Lost Parts of b1 Gear and Its Cover Disc. - Voulgaris, Aristeidis; Mouratidis, Christophoros; Vossinakis, Andreas; Roumeliotis, Manos (Heritage (2571-9408), 2026)