1917 Definitives, printed by Waterlow in London
Proof Specimen Imperforate proof of 1b. in grey-blue and red (unpunched) and perf. proof of 10s. in blue (punched) from top right corner of the sheet, both overprinted "WATERLOW & SONS LTD./SPECIMEN".
Details
Proof Specimen Imperforate proof of 1b. in grey-blue and red (unpunched) and perf. proof of 10s. in blue (punched) from top right corner of the sheet, both overprinted "WATERLOW & SONS LTD./SPECIMEN".