Lot no. 6066

10 cents dark brown/ultramarine, I. printing, tied by cds. "ST. THOMAS 15/10 1879" with additional strike alongside to registered lettersheet with boxed "Anbefalet./No.1625" to Christiansted with arrival mark of October 17. A fine and rare single franking of the first printing and the only recorded domestic registered letter with the bicoloured issue