GB 1911 Edward VII 4d Harrison Mint Duo, Perf 14 & 15, Dots Variety

Great Britain 1911 Edward VII 4d deep bright orange Harrison printing, two separate lightly mounted mint stamps. The perforation 14 example shows dots in the north-east value tablet. A perforation 15 example is included for comparison to support identification of the Harrison printing. King’s Specialised references: M26(2) / M27(2). Stanley Gibbons SG 278/286. Catalogue value: £160 for the two normal stamps, excluding any premium for the dots variety. No varieties are listed for this issue in the catalogue reference supplied.