cover 1931, cover from Nairobi to Zanzibar, bearing Kenya and Uganda 1c. tied by Nairobi c.d.s. and Zanzibar 1927-30 Postage Due 1c. (3) and single 12c. black on green all with Zanzibar c.d.s.; very rare. S.G. D1, D7, £810 off cover. Photo