The bronze coin is of compressed disc form with square hole in the center, one side marked four characters "Da Zhong Tong Bao", the reverse marked two characters "Shi Yu", the coin was used as currency during late Yuan Dynasty period.|||Diameter: 1 7/8 in (4.5 cm)|大中通寶|大中通寶背十豫，大中通寶采用五等錢製，折十背豫爲最大計值。鑄造精良，是極高的潜力品種，極美品。