A near-black silver-gelatin Wet Lab production still, 4:5 portrait: a sealed black model core rests on a steel tray while two gloved hands gently exchange its surrounding prompt membrane, memory tube, and tool socket. Three clean phosphor-green monitor lamps form the only colour band; all parts are clamped into a real hex-lattice surgical frame. Hard top light leaves the room tube-amp warm and nearly black. Numbered callouts mark the held-out test chamber, version tag, and budget valve. A crumpled coffee filter holds a tiny discarded tool plug beside the tray. One Bureau seal struck once, lower corner. No readable caption text. Output in exactly 1122 x 1402 px, 4:5 portrait ratio.