2 Gr. Blue, large shield, plate flaw VII, with clear single circle postmark "ALTENBURG 20 8 74" as a single franking on blue linen envelope at peers address, the Durchlauchtigsten princes Maurice from Saxe-Altenburg, duke to Saxony in Liebenstein (arrival postmark). Photo expertize Sommer BPP "stamp and letter are excellent condition. ", Michel 750.-