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Cap brass?
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23-07-20, 09:17 AM
KLR
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Join Date: Oct 2007
Location: London
Posts: 3,055
RACD Pattern 4480/1897 (TNA WO 359/6, 336) defines GM as 86.7% copper and 13.3% zinc by weight. This is a much higher copper content than brass.
I have not found any later composition in the WO archives.
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