cover 1891 blue envelope (223x96mm., faults) to England, bearing 1887-92 perf. 12x11½ 1d. green and 2d. dull orange tied by light Apia c.d.s. (Type 2) in blue, in combination with U.S. 5c. tied by cork obliterator, backstamped with San Francisco d.s. Rare. Photo