1923, Panama "P", black machine overprint on 30c. blue, 6.000 mint stamps within units/sheets, adhesion marks/melted gum structure. Michel no. L 654 (6.000), 24.000,- €

1923, UNITED STATES: three different Colombia issues with black opt. 'EU' in different quantities incl. 10c. blue-green (120), 20c. grey (450) and 60c. brown (240) and additional 45 x 60c. brown with black opt. 'GB' (for Great Britain), mostly in larger blocks/part sheets, mint never hinged but all with faulty gum and defective margins! Mi. LA 589/90+594, LA620, € 7.420,-- + (Image)