New Guinea 1915-15 1d on 5pf green, 5mm space from setting II, showing variety 'G.R.I.' WITHOUT STOPS BUT WITH NORMAL SPACES, SG17ga. Tied to small piece by two part strikes of RABAUL oval date stamps in violet (Gibbs type 8). Tiny mark in right margin mentioned for accuracy, but one of just two used examples known to Gibbs (with a single unused example in the Royal Philatelic Collection).
A fascinating and exceedingly rare stamp.
Accompanied with a British Philatelic Association certificate of authenticity (1991) and Royal Philatelic Society certificate of authenticity (1965), the latter as former SG 17b.
The Stanley Gibbons catalogue value is £11,000.
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