The tone sequence siren (German: Martinshorn) from around the year 2000 is a component from an unmarked police car of the city of Essen police department....
The tone sequence siren (German: Martinshorn) from around the year 2010 is a component from an unmarked police car of the city of Essen police department....
The tone sequence siren (German: Martinshorn) from around the year 2010 is a component from an unmarked police car of the city of Essen police department....
Before this police whistle from the 1980s was included in the historical collection of the Essen police, it had long been an integral part of the police...
Early railway level crossings had a flagman in a nearby booth who would, on the approach of a train, wave a red flag or lantern to stop all traffic and...
