1914, 2 d. on 20 Pfg. imperial yacht with DOUBLE OVERPRINT, ONE INVERTED, type II, 5 mm spacing, setting 6, position 2 and inverted overprint setting 6, position 4, unused with original gum, signed Bothe BPP, certificates BPA (1967), Bothe BPP (1980) and Scheller 01/2018 (Image)

1914, OVERPRINT ERROR "1 d." instead of "2 d." on 20 Pfg. imperial yacht, type II, 5 mm spacing, setting 6, position 2, unused with original gum, light facial yellowing of the paper should be tolerated as only 15 copies were issued of that rare stamp, signed Kilian BPP, certificates Kilian BPP and Scheller 01/2018 (Image)

1914: 2½ d. on 20 Pfg. imperial yacht, type II, 5 mm spacing, setting 5, position 6, tied by violet "RABAUL JUN 30 19.. NEW BRITAIN", flawless and very attractive, signed Bothe BPP, certificates Bothe and Pascal Scheller 01/2018 (Image)

1914, 3 d. on 25 Pfg. imperial yacht with INVERTED OVERPRINT, type II, 5 mm spacing, setting 10, position 3, unused with original gum, only 3 mint and one used example have been recorded, flawless, VERY RARE STAMP, certificates BPA and Scheller 01/2018 Provenance: Marquess of Bute (Image)

1914, 3 d. on 30 Pfg. imperial yacht, SURCHARGE DOUBLE, BOTH INVERTED, type II, 5 mm spacing, setting 11, position 3, unused with original gum, very rare, certificate Scheller 01/2018 (Image)

1914, 4 d on 40 Pfg. imperial yacht, DOUBLE OVERPRINT, type II, 5 mm spacing, each setting 2, position 1, with left sheet margin used on small piece with violet "RABAUL JAN 6 ... NEW BRITAIN", very rare stamp, certificates BPA and Scheller 01/2018 Provenance: Marquess of Bute (Image)

1914, overprint error "3 d." instead of "4 d." on 40 Pfg. imperial yacht, DOUBLE OVERPRINT, type II, 5 mm spacing, setting 11, position 4. Unused with original gum. ONLY KNOWN COPY with certificates Holcombe and Pascal Scheller 2018 Provenance: Marquess of Bute (Image)

1914, 5 d. on 50 Pfg. imperial yacht with upper sheet margin, DOUBLE OVERPRINT, type II, ONE INVERTED, 5 mm spacing, setting 10, position 4 and for the inverted setting 9, position 2, unused with original gum, only 4 examples with double overprint have been recorded. GREAT RARITY, certificates BPA and Scheller 01/2018 (Image)

1914, 1 s. on 1 M. imperial yacht with overprint type I, 3½-4 mm spacing, setting 3, position 4, tied by blue "STEPHANSORT", very rare stamp, certificates Holcombe and Scheller 01/2018 (Image)

1914, 2 s. on 2 M. imperial yacht with oveprint type II, 5½ mm spacing, setting 2, position 1, on piece tied by adapted "STEPHANSORT" in blue, very rare stamp, certificates BPA and Scheller 01/2018 (Image)

1914, 3 s. on 3 M. imperial yacht with overprint type I, 4 mm spacing, setting 4, position 1, unused with original gum, very rare stamp, certificates BPA and Scheller 01/2018 (Image)

1914, 5s. on 5 M. imperial yacht with overprint type I, 4 mm spacing, setting 1, position 2, unused with lightly disturbed original gum, very rare stamp, certificates RPSL and Scheller 01/2018 (Image)

1914, 5s. on 5 M. imperial yacht with overprint type II, 5½ mm spacing, setting 2, position 1, unused with original gum, only a few copies in Type II were printed, SCARCE! Certificate Scheller 01/2018 (Image)

1916, 3 d. on registration label "Manus (Deutsch-Neuguinea) No. 917" in Antiqua, black overprint "G.R.I. 3 d.", unusal fresh colour, only very few copies of overprinted R-labels were issued and only some of them outlived the century, certificate Bühler (Image)

1914, 1d. on 5 Pfg. official stamp, DIAGONALLY BISECTED, right half, together with horizontal pair of 1d. on 3 Pfg. official on cover with japanese "NAVAL P.O. JALUIT 7.4.24" (24.4.1918), red rectangle POSTAGE DUE AT THE NAVAL P.O." and red oval "SOUTH ISLAND DEFENSE CORP. CENSOR" to "BALHAM S.W.12 31.AUG.18/ ENGLAND", forwarded to Southampton with handwritten arrival mark "Received 1.9.18" on reverse, very rare, certificates Holcombe, BPA and Scheller 01/2018 (Image)