花钱大清道光通宝背大定贵州大定局开炉钱, 41.2x2.8mm 24.5g, 华夏80,尚·皮尔·米歇尔中国钱币系列,Charm/Auspicious Money, a very rare Dao Guang Tong Bao reverse Da Ding, struck in the Da Ding Mint, Guizhou Province, as one of the very first pieces nminted after its completion, weighs 24.5 grams, Huaxia 80, very rare