Original Davis Derby British Miner's Safety Lamp, retaining its original numbered brass identification plate "666", marked burner assembly stamped "NHCC 705", and original manufacturer's marked glass. A genuine working coal mining safety lamp produced by the renowned British manufacturer Davis Derby, a company closely associated with the mining industry throughout the 20th century. The lamp remains remarkably complete, retaining its original burner, marked glass chimney, brass issue number plate, and substantial steel bonnet. The brass plate numbered "666" represents the lamp's original colliery issue number, while the stamped burner assembly and marked glass further support its authenticity as a working industrial mining lamp rather than a later decorative reproduction. Displaying honest signs of age and use acquired during its working life underground, this example possesses the character and patina sought by collectors of mining memorabilia and industrial heritage objects. A highly collectible and increasingly scarce survivor of Britain's coal mining history, offered in original untouched condition.