1 Groschen large shield, carmine, lower margin piece with application point for perforation (field 145), cancelled by framed cancel of 3 lines \"Wroclaw Freiburger railway station 11 4 74\" on liable to payment of postage offical matter to Opole, double used, inside the reply the liable to payment of postage offical matter from Opole from 18.4.74 likewise with a 1 Groschen stamp - in the better large size L16 franked, an actual grand letter, photo expertize Sommer BPP: \"the doubly used letter is excellent condition. \"