1857 10 kop Russian Empire, Watermark ‘1’, Imperf (Sc. 1, Zv. 1, Mitava Postmark, CV $750) 1857 10k brown and blue, canceled by Cyrillic stamp 'Mitava". (Image)

1857 10k Russian Empire First Issue, Imperf (Sc. 1, Zv. 1, Watermark ‘1’, Signed) 1858 10k brown & blue, large margins at the top, bottom, and right. Part of another 10k stamp at the bottom. Excellent condition and bright colors, but removed cancellation at our opinion. Very scarce stamp in such condition. Catalog value for mint stamp is $150,000. Multiply times signed by experts. (Image)

1858 10 kop Russian Empire, Mint, Watermark ‘1’, Perf. 14.5x15 (Sc. 2, Zv. 2, CV $11,000) 1858 10k brown & blue, unused without gum. Watermark '1'. Very fresh colors and excellent condition. Very fine grade, extremely rare. Signed by an expert. (Image)

1858 20 kop Russian Empire, Mint, Watermark ‘2’, Perf. 14.5x15 (Sc. 3, Zv. 3, CV $22,500) 1858 20k blue & orange. Watermark '2'. Hinge remnant at the top of the stamp. Full gum. Very fresh colors and excellent condition. Very fine grade, extremely rare. Signed by an expert. (Image)

1858 30 kop Russian Empire, Mint, Watermark ‘3’, Perf. 14.5x15 (Sc. 4, Zv. 4, CV $30,000) 1858 30k carmine & green. Watermark '3'. Hinge remnant at the top of the stamp, light gum toning. Very fresh colors and excellent condition. Very fine grade, extremely rare. Signed by an expert. (Image)

1858 20k Russian Empire, No Watermark, Perf. 12.5 (Sc. 9, Zv. 6, CV $1,100) (Image)

1858 30k Russian Empire, No Watermark, Perf. 12.5 (Sc. 10, Zv. 7, CV $1,500) (Image)