T PD/18" with rest of date and rate (10as) in ms. (HG 11) just overstruck by boxed Calcutta Ship Letter d.s. (HG SD10) also showing light boxed "INDIA LETTER/DOVER" in red. Photo" /> cover Patna: 1837 (12 May) entire to London showing a very good strike of the rare octagonal "PATNA/P<V>T P<V>D/18" with rest of date and rate <I>(10as)</I> in ms. (HG 11) just overstruck by boxed Calcutta Ship Letter d.s. (HG SD10) also showing light boxed "INDIA LETTER/DOVER" in red. Photo | Christie's