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Preloved Vintage brass carbide miner's lamp
 
 
This is a brass carbide miner's lamp, also known as an acetylene gas lamp. These lamps were commonly used by miners before the widespread adoption of electric lights. 
Mechanism: Water from the top reservoir drips onto calcium carbide in the bottom, producing acetylene gas, which is then ignited to create a bright flame. (according to Google. I have no experience with such lamps)
The reflector behind the flame helps project the light forward.
Usage: They were typically worn on a miner's helmet via a hook, allowing hands-free operation. 
Identification: This specific model appears to be a "Butterfly" trademark lamp. 
Material: The lamp is constructed from brass. 
Function: It provided essential portable lighting in dark environments like mines and caves. 
Today, these lamps are primarily collected as historical memorabilia or used as decorative items.
 
The lamp has a height of 9.5cm and base diameter of 5cm. The reflector has a diameter of 10.9cm.
 
It has some marks and tarnishing. It is being sold as a NON-working light