Reference
Note:
Thierry (CMV) illustrated a small (21.5 mm, 1.73g) copper version of this design with the reverse flat. He quotes Schroder who regarded these as Vietnamese copies of the Chinese Jin Dynasty Da Ding Tong Bao (1161 – 1189). He attributed his coin to Duong Nhat Le (1369-1370). He later regarded such coins as unattributed later unofficial coins.
Reference
Thierry CMVS : Pages 14-16, cf Figures 8-9; Page 47, cf Figure 109.
Note:
Thierry (CMVS) again illustrated (Fig. 8) the coin he had previously figured in his CMV along with a second slightly larger specimen (brass, 22.7 mm, 1.76g), (Figs, 9 and 109), both with a flat reverse and both of which he regarded as unattributed late unofficial coins, Vietnamese imitations of Da Ding tong bao. However as well as illustrating one coin type with the legend reading clockwise, he also described one other distinct type of small coin with the Đại Định Thông Bảo legend reading TBRL. For this, he cited an illustration (No. 7) from Miura Gosen’s Annam Senpu, Volume II, which he described as depicting a coin with a wide outer rim and small characters, ’typical of the 18th century’. It is possible that HCR 58845 is an example of this unseen variety, dating from between 1700 and 1800, rather than of the commoner variety which Hartill dated to 1540-1590. Accordingly a provisional date of 1700 – 1800 has been assigned to this coin.