12c Black 1857 Reprint, Hybrid Large Die Proof on India (44P1).
India paper cut to shape, mounted on larger piece of India and die sunk on 140 x 217mm card with gold edge (from a salesman's sample book), intense shade, Very Fine, these only exist as hybrids and despite the modest catalog value they are scarce -- particularly in this full size, with 2008 P.F. certificate
Image Magnifier / Download
Power Search for Comparables