1930 10¢ black K George V of Kenya and Uganda (Sc 22, SG 80) tied by Kampala cds, underpaying postage to Zanzibar where it was re-franked by first issue Zanzibar Postage Dues, 1¢ pair (very rare - Sc J1, SG D1) and 31¢ (Sc J9, SG D15) tied by Zanzibar cds and forwarded to Kenya, with Kampala receiver on reverse, quite rare.
