Reference
Barker : Page 236, Figure 103.1
Reference
Thierry CMVS : Page 81, numbers 461 and 462 [not illustrated]
Note:
Thierry (CMVS) indicates that the brass issues with plain reverse were of either 6 or 9 phần in weight. By its weight and size, this coin is intermediate, since it is the same size as the 9 phần issue, but its weight is more typical of the 6 phần.
