(1) 1860 10k blue & rose, bright colors, well centered example, tied by "D.P." (Dworzec Praga) in concentric circles on complete FL sent 25 May 1864 from Warsaw to Riga, red "Ekspedycya Poczt Dworzec Praga 25.6" departure cds (slightly uneven), filing fold away from the stamp, with Riga arrival (15 June 1864) pmk on back, some ink offsets showing on front, otherwise fine, with small "1864 folded letter red circ. "Dworzec Praga" railroad canc." label, ex-Rachmanov