The one I want to get just to have is the heavy version. From Zippo's website: "A distinctive bottom stamp authenticates these chrome and solid brass lighters as heavy walled Armor™. These Armor™ cases are about 1.5 times as thick as a standard brass case."

Its hard to give up the one I have had for 20 yrs. I swore to my girlfriend who gave it to me that it would save my life someday. Its been to Europe and on many treks in the Sierras. Nostalgic as it is, I always follow the rule of more than one source of fire.