unused 6c Ultramarine, 10c Yellow (115, 116), unused, without gum, former possesses gorgeous deep rich color, very fresh and bright; latter has bright color but was determined to have faint soiling (which has been removed by immersion in ordinary warm water) along a small 'crease' (actually a small natural pre-printing paper wrinkle and certainly not a fault), otherwise fine, latter with 1998 P.F. certificate, Scott retail $1,700.00