This copy was offered in a 1989 Siegel Auction Galleries auction
as lot 573 with an estimate of 9,000 US$ - it realised 2,600 US$. (Image thanks to Siegel Auction Galleries).
It is also shown in the Sandafayre archive.
"NEW HEBRIDES, 1908, 1p Carmine, Vertical Pair, Top Stamp Without Overprint (8a). Fresh, minor hinge remnant, Very Fine, Rare, Only Ten Pairs Recorded, with Royal Certificate."
It showed up again in the 17 July 2008 auction at Prestige Philately. Australia.
"1908 Overprints on Fiji MCA 1d carmine vertical pair the upper unit with Overprint Omitted SG 2a, exceptional centring, lightly mounted, Cat £7,000.
RPSofL (1985) & Behr (1999) Certificates. It sold for 9,200 $A incl. fees."
distinctive feature: short tooth at bottom left of upper stamp.
The copy in H.M. The Queen's collection. Image thanks to Michael Sefi, Keeper of the Royal Philatelic Collection.
The stamp is accompanied by a caption by Sir Edward Bacon, who was "Curator of HM the King's Philatelic Collection"
from 1913 to 1938: "With and without overprint. Only six pairs exist". So this copy was acquired in the time after the
block of 6 was separated. Harmers of London sold a copy on 26th November 1935 - maybe this one. The right part of the sheet was not known then.
Reproduction by gracious permission of Her Majesty the Queen to whom copyright belongs.
distinctive feature: long tooth at top right lower stamp.