Crown 1847 Gothic Plain edge with N over inverted N in UNITA, ESC

Crown 1847 Gothic Plain edge with N over inverted N in UNITA, ESC 291, Bull 2577 EF with some edge nicks, the obverse with some hairlines and a scratch on Queen's hair, the reverse with a pleasing and attractive blue/green tone

Estimate: 2000-4000 GBP