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- Nov 10, 2011
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found this in my travels. a US Army lab analysis of a captured samurai sword
http://www.dtic.mil/dtic/tr/fulltext/u2/b962712.pdf
http://www.dtic.mil/dtic/tr/fulltext/u2/b962712.pdf
They tested an NCO sword which are all machine made; no relevance to true Nihonto.
Rich
The picture is very poor, but you can see what appears to be a retaining clip of the type used with the NCO swords.
n2s
read page 10 of the document. page 10(fig. 3) they cut out 3 samples of blade + the hilt and did vickers hardness test on the cross section, the widest pieces had 20 points tested. toward the point, the spine (V478) was harder than the edge(v442), about midway, spine was v437 while edge v519.They have instances of officers getting their older blades mounted into the then modern army and navy koshirae. Their tests are flawed too. If you notice they say they take all their rockwell hardness tests at the back edge (spine) side of the sword. The didn’t understand the sword was differentially hardened I guess.