Huygens Postal Stationery Cards (ordered by Series number). 1928 7 1/2c official postal stationery card by Huygens, proof in brown (Serie not inscribed but as Serie A) showing printer's name at lower left and "PROEFMODEL" at top right and no stationery die, very fine and scarce. (Image)

1928 7 1/2c official postal stationery card by Huygens, proof in black (Serie not inscribed but as Serie A) showing printer's name at lower left and "PROEFMODEL" at top right and no stationery die, vertical crease at right, scarce. (Image)

1928 5c official postal stationery card by Huygens (Serie A.6001), cancelled by the Olympic pentagonal "N2" ds, a little foxing at top left, fine and scarce with the Olympic cancel. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie B) with "PROEFMODEL" at top right and no stationery die, fine and scarce. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie C.1) with "PROEFMODEL" at top and no stationery die, very fine and scarce. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie not inscribed) with "PROEFMODEL" at top right and no stationery die, very fine and scarce. (Image)

1928 7 1/2c official postal stationery card by Huygens, proof in black (Serie not inscribed) showing printer's name at lower left and "PROEFMODEL" at top right and no stationery die, very fine and scarce. (Image)

1928 7 1/2c official postal stationery card by Huygens, proof in brown (Serie not inscribed) showing printer's name at lower left and "PROEFMODEL" at top right and no stationery die, oxidised colour, fine and scarce. (Image)

1928 5c official postal stationery card by Huygens (Serie D.1000), cancelled by the Olympic pentagonal "N2" ds, minor fox spots otherwise fine and scarce with the Olympic cancel. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie D.1) with "PROEFMODEL" at top and no stationery die, very fine and scarce. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie D.1-1000 with last 0 crossed out in pen) with "PROEFMODEL" at top and no stationery die, very fine and scarce. (Image)

1928 5c official postal stationery card by Huygens, proof in black (Serie E.1) with "PROEFMODEL" at top and no stationery die, very fine and scarce. (Image)

1928 3c official postal stationery card by Huygens (Serie F.1) depicting football, light horizontal bend, fine appearance, a popular card with this football thematic. (Image)

1928 3c official postal stationery card by Huygens depicting Cycling (Serie F.2), unused, some minor peripheral toning, fine. (Image)

1928 3c official postal stationery card by Huygens depicting Boxing (Serie F.3), unused, small stain at top and light vertical bend at right, fine. (Image)

1928 3c official postal stationery card by Huygens depicting Swimming (Serie F.4) with "DE REGENTES" advert below, unused, very fine (Image)

1928 3c official postal stationery card by Huygens depicting Swimming (Serie F.4) with "DE REGENTES" advert below, cancelled by the Olympic pentagonal "N2" ds, small tone spot at left, fine. (Image)

1928 5c official postal stationery card by Huygens, group of 11 unused cards, all different, incl. Serie A.1-1000, A.1001-2000, A.2001-3000, A.3001-4000, A.4001-5000, A.5001-6000, A.6001-7000, B.1-1000, C.1000, D.1000 and E.1000, some light toning on some cards otherwise fine and scarce group. (Image)