Use the provided white-background product image as the locked reference. Preserve the black-and-silver chronograph watch exactly: black rubber strap, dark metal case, black tachymeter bezel, silver dial, three black subdials, luminous turquoise markers, crown, pushers, and all visible dial branding. Create a premium vertical watch poster in a midnight charcoal studio. Stand the watch against low faceted black obsidian slabs and a thin reflective dark-glass surface. Change the stone architecture, surface layout, reflections, backdrop gradient, and lighting direction clearly from the source while retaining the dark technical-luxury mood. Constraints: one watch only; no watermark, poster text, people, hands, duplicate watches, altered bezel, altered dial, altered strap, or unreadable markings.