1918, Sun design, imperforated proof of 5k in carmine (issued color), printed on both sides, one impression placed upside down, no gum as produced, VF (Image)

1919, Sun design, two imperforated proofs of 10k in blue with double impression, and 25k in red, both printed on back side of an old posters, no gum as produced, VF and scarce (Image)

1919, Liberation of Riga, two imperforated proofs of 15k in green and 35k in brown, printed on reverse of an old posters, no gum as printed, VF and rare, each one expertized by G. von Hoffmann (Image)

Air Post Semi-Postal issues. 1930, Rainis Memorial, perforated complete set of two, watermark ''swastika'', in addition stamp of 10s+20s with reversed watermark variety, full OG, NH, VF (Image)

Air Post Semi-Postal issues. 1931, Home Guards Fund, imperforated complete set of eight, all possible positions of watermark ''swastika'', full OG, NH, VF, scarce (Image)

Air Post Semi-Postal issues. 1932, Home Guards Fund, two perforated and two imperforated complete sets of three, watermark ''swastika'' are in upright or reversed positions, full OG, NH or LH (two imperforated stamps of 15+30s), VF (Image)