Shilling 1826 with traces of an underlying number under the 6 of the date to the lower left curve of the 6, the position similar to the 6 over 2 variety but not conclusive. (The 6 over 2 coin usually shows a sharper 'point' in this area) VF with grey tone, the reverse with some scratches by DEFENSOR
Estimate: 20-50 GBP