"10" rate mark and French transit c.d.s.' light soiling, attractive nevertheless. Photo" /> cover 1850 (16 Nov.) blue letter sheet addressed to Bordeaux with a fine strike of the double-oval "PACKET LETTER/MAURITIUS" datestamp and straight-line "Foreign Letter", both in oily red ink, with handstruck<I> "10"</I> rate mark and French transit c.d.s.' light soiling, attractive nevertheless. Photo | Christie's