Faint Sheet with a Small Screw-and-Rack Device
Recovered after restoration; show-through of machinery and a decorative flourish
The sheet is almost blank, noted as invisible before restoration. Near its center a single small device is drawn in firm ink: a short threaded screw or worm seated within a square, ladder-toothed housing, as if meshing a rack. Around it are only faint show-through images of the machinery from the recto and a decorative interlaced flourish at the upper right.
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Short screw within a square toothed housing
At the center a small mechanism is drawn: a short threaded screw or worm set inside a square, ladder-toothed block, as if meshing a rack. It is the only firmly inked element on an otherwise faint sheet.