1890's dual-chambered whistle Bicycle High Wheeler Road Clearer Overman Pennyfar1890's dual chambered whistle Bicycle High Wheeler Road Clearer Overman Pennyfarthng this one is dated 1885 dual chambered whistle was designed to produce two distinct tones simultaneously, creating a loud "siren" effect to warn pedestrians and horse drawn carriages. History: In the late 19th century, bicycles (particularly "High Wheelers") were nearly silent due to new inflatable rubber tires. This made them dangerous to pedestrians, leading