Prussia, 1852 1Sgr on rose + 2Sgr on blue & 2Sgr on yellow. Tied together on 1852 folded cover to Frankfurt by three strikes of numeral "258" in concentric circles with "Coeln" double circle postmark alongside, all stamps well margined, Extremely Fine and choice, a wonderful three color franking. Michel No. 2+3+4. Estimate  $750 - 1,000. $0 (Image)