(May 26, 2016)
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Item Information
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| Weight | 7 grams | | Size | 27 mm | | Reference | Hartill 22.245 | | Obv | Qiang Long Tong Bao | | Rev | Bao Quan (The board of Revenue Mint) | Large coins, diameter over 26 mm, weight 5-7 grams
Their official weight was 1.6 qian
Their alloy was high quality brass composed of 60% copper and 40% zinc
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