This almost makes one wonder whether its original purpose was military rather than civilian. The development took 5 years in which many obstacles had to be taken. The main challenge was to create an alarm that was loud enough. Vulcain achieved this by creating a mechanism where a hammer hits a membrane. www.watchesreplica.is This sound is then amplified by the double case back which acts as a resonance chamber. A designated barrel for the alarm function ensures that the alarm sounds for at least 20 seconds when fully wound. The name Cricket comes from the sound that the alarm makes quite similar to that of the little insect that shares the same name.