The telegraph is a device installed on the bridge of a ship with a replica in the engine room, by means of which the desired orders of speeds are transmitted. It aims to be an undoubted and effective means of communication. The pilot, the captain or the officer on duty, actuates the mechanism selecting a position or degree of speed, making an alarm in the engine room and on the bridge to sound, and only when the driver official responds by matching in his telegraph the position of the needle selector then the alarm ceases, informing both ends that the order was received and interpreted correctly.This mechanism was very effective during times that there was no internal communication by voice between the different parts of a ship, and besides, due to the technology, the engines were handled directly from the machine rooms of the ships and not from the bridge. Nowadays, the propulsion plant in modern ships is commanded and controlled directly from the bridge but by tradition they continue to call the remote control system in the same way, and is maintained, although in a more sophisticated way, the shape of the old telegraph.This telegraph is from the second half of the 20th century20 cm in diameter, height of 50 cm, 30 cm in width