30 Pf. brownish olive with net pattern overprint, original stamp each from left margin in the rotary printing, 4 faultless values on postage exceeding tariff rate registered cover from 13.7.48 from BARNTRUP to Detmold, photo expertize study group (Bernhoeft) and expertized Schlegel BPP, by the Michel-Catalogue representative side margin pieces 60% from value the upper margin copies, very rare! Michel - .