1 Mark dove from upper margin (not perforated throughout) in mixed franking with no. 915, 926, 955 and no. 37 I from 23.6.48 (tenfold franking) from Lüneburg to Halle / Saale used. No. 959 b in colour variety "black gray yellow, strong fluorescing". Slight adhesive patches on the letter. Study group colour determination enclosed. Michel the particular stamp 1.000.-