Japan 1 Mon "Kan'eitsūhō", 1739 – 1859
Iron alloy; blank reverse
Information
Country
Japan
Currency
Mon
(683 – 1953)
Coin type
Standard circulation coin
Denomination
1 Mon "Kan'eitsūhō"
Year
1739 – 1859
Composition
Iron
Shape
Round with a square hole
Alignment
Medal alignment ↑↑
Technique
Cast
Weight (g)
2.55
Diameter (mm)
23
Thickness (mm)
1.3
Demonetized
Yes
Mintage & Variants
| Date | Mintage | Comment | Frequency | |
|---|---|---|---|---|
| ND (1859) | — | 安政期小菅銭 ANSEI-KI KOSUGE-SEN; コ as head of 通; bottom 寶 connected like ス | 8% | |
| ND (1835) | — | 十字寛 JŪJIKAN; マ as head of 通; 十 instead of 卄 in 寛 | 30% | |
| ND (1767) | — | 明和期伏見銭 MEIWA-KI FUSHIMI-SEN; コ as head of 通; bottom 寶 separated like ハ | 11% | |
| ND (1765) | — | 明和期亀戸銭 MEIWA-KI KAMEIDO-SEN; コ as head of 通; bottom 寶 connected like ス | 9% | |
| ND (1740) | — | 虎ノ尾寛; コ as head of 通; bottom 寶 separated like ハ; 寛 with very long right tail | 4% | |
| ND (1740) 一 | — | (unknown variant of) countermarked ㊀ on upper left and upper right rim | 14% | |
| ND (1740) 一 | — | cast die countermark ㊀ on upper left and upper right rim | 1% | |
| ND (1740) 一 | — | hammered countermark ㊀ on upper left and upper right rim | 1% | |
| ND (1740) 川 | — | (unknown variant of) countermarked 川 on rim | 5% | |
| ND (1740) 川 | — | countermarked 川 on upper left and lower right rim | 2% | |
| ND (1740) 川 | — | countermarked 川 on upper left and upper right rim | 2% | |
| ND (1739) 十 | — | countermarked 十 on upper right rim | 14% |
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