1949 horizontal pair of 8ca surcharged FOUR PIES perf. 11 with error surcharge inverted and in pair with one without surcharge. Note that both errors (inverted surcharge) and (pair, one without surcharge) are listed but the combination of both errors is not listed in SG catalog. As such, possibly unique. With Jal Cooper's initials in pencil on reverse. Unused without gum as issued. 2025 ISES certificate.