Symbol DescriptionDigitalEnd of seriesWhite light changeRed / white light changeLengthPrivateLimited EditionSound integratedDirect currentAlternative currentEra I (1835-1920)Era II (1920-1945)Era III -IVEra III (1945-1975)Era IV (1975 - 1990)Era V (1990-2006)Era VI (2006 until today)16 pins22 pins6 pins8 pinsSwiss railwaysSwiss railwaysLuxemburg railwaysCzechoslovak railwaysGerman railwaysGerman railwaysDanish State RailwaysItalian railwaysPrussian railwaysHungarian railwaysDutch RailwaysNorwegian State RailwaysAustrian RailwaysPolish railwaysSpanish RailwaysSwiss railwaysSwedish RailwaysBelgian RailwaysFrench RailwaysSoviet railways