Lot 30309 – 1916 1/2d green in vertical pair with one stamp double overprint variety, along with 6d in vertical pair with upper stamp without overprint variety, on cover

1916 1/2d green in vertical pair with one stamp double overprint variety, along with 6d in vertical pair with upper stamp without overprint variety, affixed to OHMS cover with the rest of the set tied by Field Post Office « G.X. » 2 MR 16 double circle ds, sent by the well-known philatelist H. Pirie Gordon from HMS « Exmouth » with two censor cachets, a showpiece item with the set and two rare varieties, with only 12 pairs of the 1/2d printed as such and 24 pairs of the 6d printed as such; cert. Holcombe (1999) (S.G. S1b £5’000 off cover, S6a £3’250 off cover, and used set £3’500).