I am assuming this is some type of antique water heater from the early 1900's but I am not sure. It looks to be all copper with some kind of tank off the the back and gas valves at the bottom.
Category
Other
Medium
Copper
Distinguishing marks
Number on front says SL 3744 and the burner on top says Rochester patent April 26, 1904
Re: Antique copper water heater
Well, its condition is okay and it is from Rochester, NY between 1904 and 1920, giving it a $150-$200.