1913, Peter the Great, imperforated large die proof of 1k in black, printed on chalk-surfaced thick paper, size 47x45mm, traces of hinge at top, no hidden defects, VF, proofs in black are extremely rare, only a handful was produced, Est. $1,200-$1,400 (Image)

1913, Peter the Great, imperforated large die proof of 1k in carmine rose, printed on chalk- surfaced thick paper, size 46x50mm, no thins or other hidden defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Peter the Great, imperforated large die proof of 1k in orange, printed on chalk-surfaced thick paper, size 47x57mm, traces of previous mounting, no thins or other defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Alexander II, imperforated large die proof of 2k in black, printed on chalk-surfaced thick paper, size 41x50mm, traces of hinges at top, no usual thins, VF and very rare, Est. $1,200-$1,400 (Image)

1913, Alexander II, imperforated large die proof of 2k in carmine rose, printed on chalk-surfaced thick paper, size 47x48mm, traces of hinges as usual, no hidden defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Alexander II, imperforated large die proof of 2k in brownish orange, printed on chalk- surfaced thick paper, size 43x51mm, usual hinge traces, no hidden defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Alexander III, imperforated large die proof of 3k in black, printed on chalk-surfaced thin cardboard, size 34x44mm, shallow paper scratch on reverse with no importance, VF and very rare, Est. $1,000 -$1,200 (Image)

1913, Alexander III, imperforated large die proof of 3k in green, quadruple (three inverted) impression on chalk-surfaced thick paper, size 48x57mm, traces of hinge at top, no usual thins or other hidden defects, VF and probably unique, Est. $1,500-$2,000 (Image)

1913, Alexander III, imperforated large die proof of 3k in carmine rose, printed on chalk-surfaced thick paper, size 39x53mm, trace of hinge at top as usual, no thins or other defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Alexander III, imperforated large die proof of 3k in yellow orange, printed on chalk- surfaced thick paper, size 45x49mm, no thins or other hidden defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Peter the Great, imperforated large die proof of 4k in black, printed on chalk-surfaced thin cardboard, size 45x60mm, VF and very rare, proofs in black were printed in very small quantity, Est. $1,200- $1,400 (Image)

1913, Peter the Great, imperforated large die proof of 4k in carmine rose, printed on chalk- surfaced thick paper, size 47x50mm, usual hinge traces, no thins, VF and rare, Est. $1,000-$1,200 (Image)

1913, Peter the Great, imperforated large die proof of 4k in orange, printed on chalk-surfaced thick paper, size 41x48mm, traces of hinges as always exists, no hidden defects, VF and rare, Est. $1,000-$1,200 (Image)

1913, Catherine II, imperforated large die proof of 14k in black, printed on chalk-surfaced thick paper, size 38x47mm, VF and very rare, only limited quantity of 14k proofs were printed, especially in black, Est. $1,500-$1,800 (Image)

1913, Catherine II, imperforated large die proof of 14k in ultramarine, printed on chalk-surfaced thick paper, size 48x74mm, traces of hinges as usual, no thins or other hidden defects, VF and very rare proof of 14k, especially in such color, Est. $1,500-$1,800 (Image)

1913, Catherine II, imperforated large die proof of 14k in reddish orange, printed on chalk- surfaced thick paper, size 39x45mm, usual hinge traces, no hidden defects, VF and very rare proof of 14k denomination, Est. $1,300-$1,600 (Image)

1913, Nicholas I, imperforated large die proof of 15k in black, printed on chalk-surfaced thick paper, size 40x47mm, slight thins at top corners, still VF and very rare proof, especially in black, Est. $900-$1,100 (Image)

1913, Nicholas I, imperforated large die proof of 15k in light blue, printed on chalk-surfaced thick paper, size 45x71mm, traces of hinges as usual, no thins or other defects, VF and very rare proof in blue color, Est. $1,300-$1,600 (Image)

1913, Alexander I, imperforated large die proof of 20k in black, printed on chalk-surfaced thick paper, size 28x35mm, shallow thin spots at top corners, still fresh, VF and very rare, Est. $900-$1,200 (Image)

1913, Alexander I, imperforated large die proof of 20k in blue, printed on chalk-surfaced thick paper, size 36x50mm, slight traces of previous mounts, no thins or other defects, VF and very rare proof in blue color, Est. $1,300-$1,600 (Image)

1913, Alexander I, imperforated large die proof of 20k in carmine rose, printed on chalk- surfaced thick paper, size 37x44mm, traces of hinges as always, no thins or other defects, VF and rare, Est. $1,000 -$1,200 (Image)

1913, Alexander I, imperforated large die proof of 20k in vermilion, printed on chalk-surfaced thick paper, size 40x44mm, usual trace of hinges, no thins or other defects, VF and rare, Est. $1,000 -$1,200 (Image)

1913, Alexis Mikhailovich, imperforated large die proof of 25k in black, printed on chalk-surfaced thick paper, size 37x48mm, VF, proofs in black are very rare, especially for 25k denomination, Est. $1,600-$1,900 (Image)

1913, Alexis Mikhailovich, imperforated large die proof of 25k in blue, printed on chalk-surfaced thick paper, size 39x48mm, no thins or other defects, VF and very rare, especially for 25k denomination, Est. $1,300-$1,600 (Image)

1913, Paul I, imperforated large die proof of 35k in black, printed on chalk-surfaced thin cardboard, size 38x50mm, no any thins or hidden defects, VF and very rare, Est. $1,300-$1,600 (Image)