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Los 970

1847/1860, 4 folded covers with oval "ONGEFRANKEERT ZEEBRIEF"  of "BEZOEKI", "MACASSAR", "SOURABAY+ZIERIKZEE" (on one cover) and blue oval "ZEEBRIEF FRANCO" to Holland with different taxes and cancels, one cover with handwritten endorsement "per Overland Mail...." and "PURIFIE AU LAZARET/MALTE"