U5 1881 (10 Apr.) U5 to London, bearing 1880 (Mar.) 10c. (S.G. Type a) tied by firm's cachet and cancelled by dumb obliterator, showing "SINGAPORE/PAID" c.d.s. partly overstruck by London Paid arrival d.s., both in red; the U5 with some peripheral creases caused by original enclosure. Scarce. Photo