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Schjöth 1421, Hartill 6.20 Type A1.1, KM 312.1
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Kangxi (1662-1722)
1 cash (cast brass), 1662-1683, Board of Works mint (in Beijing), 28 mm.
Obv: Kangxi tongbao.
Rev: Boo yuwan.
Type A is comprised of coins with a seven stroke bei, two dot tong, and a zigzagged bottom of the tong radical. Type A1.1 is comprised of large, well made coins weighing 4 grams or more and a diameter over 26 mm.
Hartill rarity 10
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