Colombia / 1/2 reale of Cartagena, siege coinage 1811-1813 KM D2

[saro]

Could anyone identify this copper coin?

[Manzikert]

Colombia, Cartagena, siege coinage 1811-1813 (1812 I think), half reale, KM D2, [181]2/ ESTAT

• / DE CA[RTA]/ GEN[A]

Alan

[saro]

You blew me away ! 
Thank you.
This coin is not mine, the owner will be pleased as I suppose that it isn't common.

[Manzikert]

The price in Krause is quite low, but they say the price can be much higher if there is more detail on the coin. I'm afraid I am totally unqualified to assess how his piece compares with the norm though!

Alan