Unsure the exact 'Longine' watch it was meant to be, might be 'Presence'. The back bears numbers L4 637.2 which on internet only seems to link to imitation products. It came not in a proper box (slightly used but nearly pristine), and the strap bears the logo but I'm not convinced. The seller says he's had new batteries installed by proper Longine dealers with no problem, but I remain suspicious and am in a dispute with the ebay vendor