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These highly collectible artifacts function by dropping water from an upper chamber onto calcium caroffere pellets in the lower tank. This chemical reaction produces acetylene gas, which feeds through a small burner tip centered inside the reflective metal shield. They were the primary light source for subterranean coal and metal miners before portable battery-powered electric cap lamps took over.A full, five-piece collection like this offers excellent value on the secondary market1.This item is a rare antique British-made \"Dazzler\" model caroffere bicycle lamp, manufactured by Powell & Hanmer (P&H) of Birmingham, England
2. This item is a rare antique early 20th-century \"Aceta\" No. 318 caroffere bicycle lamp, manufactured by Joseph Lucas Ltd. of Birmingham, England.
