A distinctive Omega watch Constellation Chronograph Used in very excellent condition All attachments included . 38mm men's size Three-button chronograph Luminous hands and markers Date display window . Model Number (Reference): 1512.30.00 Crystal: Sapphire (scratch-resistant ruby) . Production period for this type of watch: Approximately from the late nineties to the early 2000s (around 1997–2003), meaning it's considered vintage. . Watch movement: Quartz - battery operated 100% original Swiss made Watch Size: 38mm Material: Stainless Steel Movement Type: Quartz Brand: Omega Features: Chronograph