10 C. brown-ochre in normal perforation (at the bottom a tooth shortish) and 25 C. dark brown (good colour) both in type I "tips to the top", reverse fixed on registered letter with horseshoe cancel "COLMAR 4 Decbr. 71" (Reichspost period) to Rivaucille with scarce early registration label in meander sample, excellent condition (insignificant opening crack with hinge reinforced), photo expertize Flemming BPP, which emphasizes the it public no other document of this kind recorded is.