Various images of Chongtong and Chongtongjeon
  
      154. Samchongtong (Three-shooter cannon) Early Chosun Dynasty

Length : 31.2 cm diameter : 19 mm weight : 1,100 g
Inscription : Samchongtong (Three-shooter cannon)
Courtesy : Military Museum
Fires Chajungjeon (Refer to the illustration below)