Here are three Peak 1 Apex-type stoves. By the first picture in the group, we have: 1. Peak 1 Apex (black) - 1993 2. Peak 1 Apex II Exponent (copper) - 2002 3. Peak 1 Apex II (silver) - 1999 The black Apex stove burns Coleman Fuel or Kerosene with the included generator (Notice the notches on the retaining nut.) Also instead of a plug, like the other stoves, a black cap is used to cover the female connector on the stove. One more thing to notice is the feet are attached with bolt and nut rather than rivets on the later models. This stove includes maintenance kit and sack. The Apex II stoves are both Dual Fuel, meaning they will both burn Coleman Fuel or Unleaded Gasoline. Will use kerosene with the correct generator, according to the instructions. The silver Apex II has been fitted with a new hose, which is double the length of the others, and new metal braid (see this topic ). Also fitted with new O-rings. All will simmer or provide 7500 BTUs at maximum output. Bottles will allow 20 oz of fuel.