cover 1852 (29 July) XU5 registered from Sydney "per Emperor" to London, variously rated and bearing 3d. yellow-green on grey wove paper with four margins in combination with Laureated 6d. vandyke brown on grey wove paper with margins in places (small tear towards lower right), showing "CROWN/REGISTERED" in red and "Registered/Sydney." h.s., Sydney and London c.d.s. on reverse; the XU5 a little soiled, otherwise sound and a very rare combination. Photo