目录
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| 正面描述 | 登录 以查看详情 |
|---|---|
| 正面文字 | 登录 以查看详情 |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | Plain (KM#4a.1, 1991) or Reeded (KM#4a.2, 1996) |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 1991 - KM#4a.1 Heaton , Birmingham (smooth edge, small value and year number, smaller bough and beak)) - 1996 - KM#4a.2 South African Mint (reeded edge; thick letters + numbers, redesigned coat of arms with small animal) - |
| 附加信息 |
The KM#4a designation marks the transition from the original bronze composition to bronze-clad steel — a cost-driven recoinage decision common across sub-Saharan Africa in the early 1990s as copper prices made small-denomination bronze coins economically irrational to produce. Botswana made the switch quietly, with no public announcement distinguishing the new planchet type from its predecessor in circulation.