France 1849 Cérès 20c black on yellow (Yv. 3, SG 3, Michel 3) on cover, cancelled by clean “belle grille” and Ribécourt Type 14 postmark (4 June 1850). Certified genuine by Swiss Association of Philatelic Experts (SBPV/ASEP), Excellent condition. Similar covers have realized around CHF 600 in recent Corinphila auctions.
