I am very much delighted about this find.
Very much in working condition, the reservoir large enough to fit a quart of oil.
The "Rochester” Victorian light fixture was made in brass or oxidized silver. The founts held over a quart of oil, enough for two long evenings in an 1890s Victorian parlor. The lamp was 10 1/2 inches high to the top of burner, and had solid metal handles. The lamp featured a porcelain shade.
(from Victoriana Magazine)
Clear miniature lamps look like this:
(with the smallest baby being also a recent acquisition...)
The larger chimney is being referred as Fur Trade Lamp chimney.