Texas Teardrop,
The 200 and the 242 are both single mantle.
I'm curious to know if your burner frame has two legs, one on each side of the generator tube... Or if it only has one leg, off to the side of the generator tube.
My hunch is that somebody wanted to trick out a 200 and put the nickel fount on it and gave you the 242 with a 200 fount.
It doesn't make sense to me for your lantern to have a 242 colar and a 200 burner frame.
BTW- I'd take a 242 over a 200 anyday and you can on occasion find just the nickel fount for a 242 on Ebay... If that is the case. (You have a 242 with a 200 fount)