1 - 50 Pfg academy of sciences, 10 values complete on registered cover from" (10) LEIPZIG C1 10.7.50" to jackson Heights / USA with arrival postmark, in perfect condition, cover at the bottom opened and slight transport traces, rare First Day Cover, photo expertize Paul BPP "the stamps are genuine and immaculate. The stamp impressions are genuine and date-appropriate. There is transported First-Day-Cover (First Day Cover) before. ", Michel 800.-