1850, 2 1/2 Rp \"local mail\" in type I (with cross bordering), horizontal pair (types 37 and 38), tied by blue dated postmark \"Boudevilliers 29 . 1851\" on piece, apart from one slight touch above large margins all around and having bright colours good overall condition, expertized Richter and photo expertize Marchand SBPV (2022) : \"rather rare with this dated postmark to find. \", Michel 3.400.-