2 Mark Bavaria with overprint "Sarre", black gray violet, overprint error I "three in lieu of five grid lines over Bavaria" (field 21 / 22, plate 1a-2), used "St. Ingbert 5 MRZ. 20" on piece, faultless condition, expertized Burger BPP and photo expertize brown BPP (2016) : "the quality is perfect. ", Michel 500.