Period

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Setup for switching to mercury, Un interrupteur rapide au mercure, page, photomechanical print,
LZT26A77_384

Setup for switching to mercury, Un interrupteur ra...

Machine for switching tracks
LZT10A00_141

Machine for switching tracks

Nineteenth century railway features: Rectangular turning plate and a cross section of this plate
LZT10A00_145

Nineteenth century railway features: Rectangular t...