what is this?

GPT 4o does not really know, but does provide a useful ‘description’ / translation!

A historical illustration showing a mechanism for transferring a stagecoach or similar vehicle onto a railway wagon. The text at the bottom is German and reads “Maschine zum Uebersetzen der Diligencen auf Eisenbahnwaggons,” which translates to “Machine for transferring the coaches onto railway wagons.”

Based on the style and subject matter, it likely dates back to the 19th century, during the early days of rail transportation when such mechanisms were developed to facilitate the movement of passengers and cargo between different modes of transport.