1 mun
23.11mm diameter

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#2 is N#257917
There are three similar coins here, the difference is the writing used: seal, cursive and Li scripts. By the photos, the one with seal script is the one that comes closer.
For #1, it's looking Vietnam instead of Korea, some similar coins there but no matches yet.
Giobruno
For #1, it's looking Vietnam instead of Korea, some similar coins there but no matches yet.
It looks like Kai Yuan H#14.118 of Su Zong (756-762)
During the period 998-1009 AD, one of the first korean coin was produced based on a Chinese coin. This coin had also the inscription 開元通寶
Frenchlover
Giobruno
For #1, it's looking Vietnam instead of Korea, some similar coins there but no matches yet.
It looks like Kai Yuan H#14.118 of Su Zong (756-762)
During the period 998-1009 AD, one of the first korean coin was produced based on a Chinese coin. This coin had also the inscription 開元通寶
Good catch, thanks!!
Looking on our catalog, it is here: N#46041
The figure at the commets says reverse type “ac”.
But looking at the year lines, how should we consider this one? Early, mid, late, shoulder or not on 元…?
Edit: reading it again, yes I linked a Chinese coin, searching “kai yuan” here gives mostly chinese coins, except a few imitations from Central Asia and Southeast Asia, nothing from Korea.
If it's exactly what you said, korean imitation of anonymous Kaiyuan Tongbao, then it is not on our catalog.
Quote Primatrek:
During the period 998-1009 AD, another coin was produced which was also based on a Chinese coin. This coin had the inscription 開元通寶 (kae won tong bo) which was the same as the coins cast during the reign of Emperor Gao Zu (高祖) of the Tang Dynasty.
“ag” gets 3 crescents, this variety is “ac”.
Diameter id 2mm less than it should
Frenchlover
Quote Primatrek:
During the period 998-1009 AD, another coin was produced which was also based on a Chinese coin. This coin had the inscription 開元通寶 (kae won tong bo) which was the same as the coins cast during the reign of Emperor Gao Zu (高祖) of the Tang Dynasty.
“ag” gets 3 crescents, this variety is “ac”.
Diameter id 2mm less than it should
Oops, typed wrong letter, thanks for pointing.
Giobruno
Frenchlover
Giobruno
For #1, it's looking Vietnam instead of Korea, some similar coins there but no matches yet.
It looks like Kai Yuan H#14.118 of Su Zong (756-762)
During the period 998-1009 AD, one of the first korean coin was produced based on a Chinese coin. This coin had also the inscription 開元通寶
Good catch, thanks!!
Looking on our catalog, it is here: N#46041
The figure at the commets says reverse type “ac”.
But looking at the year lines, how should we consider this one? Early, mid, late, shoulder or not on 元…?
Edit: reading it again, yes I linked a Chinese coin, searching “kai yuan” here gives mostly chinese coins, except a few imitations from Central Asia and Southeast Asia, nothing from Korea.
If it's exactly what you said, korean imitation of anonymous Kaiyuan Tongbao, then it is not on our catalog.
So is this Korean or Chinese, or is it a coin that is not in the catalog?
Due to it's small diameter , most probably an evocation of a chinese coin.
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