cover 1939 (25 Oct.) "Stanley Gibbons" envelope registered to London bearing 1924-37 1c., 6c. scarlet and 8c. grey-black vertical strip of three, all tied by Type D5 c.d.s. and showing "PASSED/FOR/TRANSMISSION" h.s. in violet with Singapore transit d.s. (31.10) on reverse; some minor creases but a scarce franking