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The color case hardening expert used by gunmakers like Martini and Hagn (http://www.martiniandhagngunmakers.com/) is Oskar Kob from St. Peter's, a small village on Cape Breton Island, Nova Scotia, Canada. Contact info. at: (http://oldguns.ca/site/Colour_Case_Hardening.html)
The color case hardening expert used by gunmakers like Martini and Hagn (http://www.martiniandhagngunmakers.com/) is Oskar Kob from St. Peter's, a small village on Cape Breton Island, Nova Scotia, Canada. Contact info. at: (http://oldguns.ca/site/Colour_Case_Hardening.html)
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