1908, King Carol I, imperforated plate proof in blue with no value indicated, proposed for 25b denomination, right sheet margin block of four, trace of die sunk at right selvage, no gum as issued, NH, VF and rare multiple, Est. $300-$400 (Image)

1908, King Carol I, imperforated plate proof in red with no value indicated, proposed for 50b denomination, right sheet margin block of four, trace of die sunk at right selvage, no gum as issued, NH, VF and rare in block, Est. $300-$400 (Image)

1930, Project of New Definitive issue, King Carol II, four different designs for 3L, 10L, 6L and 25b in six, eight or ten colors, the total is 30 imperforated essays printed on wove paper, no gum as issued, all arranged on two pages from a Collection, VF, Est. $400-$500 (Image)