Rare Antique Canteen Form Whale Oil Kerosene Lamp w/ Dual Burners & Extinguisher

Unusual and rare canteen form dual whale oil / kerosene oil lamp

There is a brass collar at the top presumable for a kerosene burner

There is also a single-wick whale oil burner at the bottom which is attached to an extinguisher with a knob just beside the top brass collar that pushes in to extinguish the whale oil burner

There is a piece of wood inserted into the brass tube and protrudes from the collar section; don't know what the wood is for

Good used antique condition; the metal plate underneath the whale oil burner has a separation from the body of the lamp

Approximate measurements (may vary slightly):  4 5/8" end to end, 3 3/4" side to side, 3 1/8" top to bottom, 1 1/16" diameter brass collar