They look like regular old lamps only prettier. I've heard of something called alladin lamps (I think) that are supposed to be amazingly bright. They don't look like a regular oil lamp, the chiminey is tall and slim and it might have something other than a regular wick, but they are not pressurized like a coleman.
Here is an excerpt from a search I did:
Aladdin Lamps
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(We no longer sell this lamp as Aladdin stopped making this model but are leaving the page up for informational purposes.)
The Aladdin Model B165 Watchman Kerosene Lamp
This is the Aluminum version of our kerosene lamp. It has all the features that have made Aladdin lamps famous worldwide and you have the perfect answer to the growing demand for nostalgically beautiful conventional lighting or emergency lighting during power failures.
Aladdin Lamps
Pure, white light equal to 60-watt bulb
No pumping or start up necessary
Safe... smokeless... odorless
Burns 12 hours on one quart of lamp oil
Patented Burner Assembly Every Aladdin lamp gets its exclusive brilliant, highly efficient lighting qualities from Aladdin's patented mantle and burner assembly. This highly advanced feature makes Aladdin lamps technically and operationally superior to all oil-burning lamps in dependability, fuel burning efficiency and light emitting quality.