cover Long XU5 originally produced for the Great Exhibition of 1851 and subsequently employed for the annual Exhibitions which started in 1871 at South Kensington, with "ANNUAL INTERNATIONAL EXHIBITIONS." imprint at top and showing attractive fancy red oblong handstamp, red "OFFICIAL PAID/LONDON.W" c.d.s. of 21 Oct. 1871, central crease and light bands of toning, otherwise fine