unmounted mint 20c Franklin D. Roosevelt (1950 var.), two complete sheets of 48, each drastically misperfed (vertically) showing full gutter at L. and small portion of adjacent stamps from the adjoining pane, vertical perfs. shifted through the middle of 'USA 20c' (therefore, each stamp shows 4-5 mm of adjoining stamp), never hinged, very dramatic and eye-catching freaks, very fine