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Welcome to TFL, Ryan ! .
I would suggest posting clear pics, with closeups of the stamping/markings, over on the ASSRA site, where many collectors hang their hat.
http://www.assra.com/cgi-bin/yabb/Ya...ard=collecting
Also, your friend might glean some significant info from this book ($15 @ amazon.com) that has documents regarding the John Brown raid.
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