Original signal whistle as used in shipping. This boatman whistle with typical bulb is chrome-plated and fitted with an attachment ring. Using a specific technique, it is possible to produce different types of whistle tones. The crude shape of this whistle dates back as far as the fifth century BC, when this model was used on Greek galeic ships to give rowers equal stroke. FEATURES size: 12.5 x 2.5 cm weight: 24 gr colour: chromed
