From what I can find, Kalonium, was an early trade name Omega used for stainless steel. Caliber 20F
Nice piece! Was tempted to throw in a low bid. There have been some nice tanks on ebay lately!
Luv it! Sounds like something from a vintage science fiction novel.
The big question is whether Kalonium makes Superman weaker or stronger
You beat me to it. I think it is his underwear material.
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