清代钱币存世量大,容易收集。因此不少收藏者十分注意对清代钱币版式的研究,尤其关注清钱中的一些特殊品种,如清代小平钱中的厚重品就是其中之一。清代制钱的重量变化较大,但主要集中在清初。据清人王庆云《石渠余记》载:“顺治之钱有数品,初有一钱、一钱二分、一钱二分五厘三品。……十四年更铸重钱(重一钱四分)。”康熙二十三年,因铜材价贵,民间多毁钱图利,于是改每文重一钱,“四十一年,又以钱小盗铸者多,复旧制一钱四分……。至雍正十二年铜贵,钱本多亏,乃酌轻重之中,定一钱二分之制。自是以后,铸钱虽有不同,而轻重显若划一,其有不齐,则局匠冒禁偷减,非功令有所改 Qing Dynasty coins surviving large, easy to collect. Therefore, many collectors paid close attention to the study of the coin layout in the Qing Dynasty, paying particular attention to some special varieties of money in the Qing Dynasty, such as the heavy goods in the Xiaoping money in the Qing Dynasty. The weight of making money in the Qing Dynasty changed a lot, but mainly concentrated in the early Qing Dynasty. According to the Qing Wang Qingyun ”Shiqu Yu Ji“ contains: ”Junji’s money has several goods, the beginning of a money, a penny, a penny five cent products ... ... fourteen years more cast money (weight a quarter). “Kangxi twenty-three years, due to expensive copper, civil destruction of money Tu Li, so every text weight one money, ” forty-one years, but also to cast a small money pirates and more, Points ... ... to the Yongzheng twelve years of copper expensive, thanks to money, is discretionary among them, set a two-part system.From then on, casting money though different, and the severity of the same if the inconsistency, The bureaucrats banned the embezzlement, unofficial orders have changed