5 Pfg. On 15 Pfg. Dark violet with overprint type "IIIa" and with properly franked additional franking 5 Pfg. On 20 Pfg. Blue and 10 Pfg. On 20 Pfg. Blue on cover from Opole 31.3.20 to Dresden, cover on the reverse side with affixed old lot description, otherwise perfect, expertized vineyard and detailed photo expertize Gruber BPP: ". Genuine and in perfect quality! " - extreme scarce use of the error in surcharge or overprint on cover!