hmmm
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- Jun 9, 2007
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THE DIAMETER IS ABOUT 3 INCHES AND IS WEDGED INTO THE ROCK.What's the approximate diameter of the bar? Is it anchored to the rocks or just wedged in there?
I know modern lightning rods are copper clad, but they're usually only 1/2"( at least for residential applications)
Try posting it in the what's it forum, the guys there maybe able to help you figure out the time period.