The Albert Butin Railway Lantern is a signalling device used in rail transport, invented by the French engineer Albert Butin, a graduate of the Ecole Centrale de Paris (ECP). This lantern was used in France during the 19th and early 20th century to indicate the presence and direction of trains on railway tracks.
The lantern consists of a metal casing with a glass lens on the front and two interchangeable lenses on the sides, which can be red, green or yellow to indicate different train conditions. In this case they are yellow.
Inside the housing comes the oil lamp.
Inscription: Albert Butin ingenieur E.C.P 35 Rue des martyas, Paris.