and two used), perf. 12x10 (one overprinted "Specimen" and three used) and perf. 11 (one overprinted "Specimen", one unused and five used); mainly fine. Cat. £1675+" /> A mainly used selection comprising perf. 13 (one unused and two used), perf. 10 (one overprinted<I> "Specimen"</I> and two used), perf. 12x10 (one overprinted<I> "Specimen"</I> and three used) and perf. 11 (one overprinted<I> "Specimen"</I>, one unused and five used); mainly fine. Cat. £1675+ | Christie's