An attractive 7-piece collection of premium mid-century African and colonial postal history (1952–1975), featuring highly complete definitive sets, rare registered mail, and an exceptional dual-country aviation combination cover. 1. SOUTH AFRICA & NETHERLANDS – 1952 Dual-Franked KLM Flight Cover: An outstanding joint postal history piece celebrating the Jan van Riebeeck Tercentenary. Features the complete 1952 South Africa Festival set (5 values) and the complete 1952 Netherlands Jan van Riebeeck set (5 values). Canceled in SA (14 MAR 52), flown via KLM to Holland for arrival cancellations, and struck with the rare purple "Counter Value / KLM Cts / Received" aviation cachet. Highly collectible. 2. ZANZIBAR – 1954 Sultan’s 75th Birthday Complete Registered Set: Genuine Registered Airmail Cover sent from Zanzibar to Mombasa, Kenya. Features the complete 5-stamp commemorative set (up to 1s.25c) on a beautiful red and blue illustrated dhow cachet envelope. Features a stamped "R" registration box with handwritten tracking numbers. 3. ZANZIBAR – 1952 Sultan’s 73rd Birthday Definitive Short Set: A clean, crisp cover featuring 9 definitive denominations with neat circular date stamps (ZANZIBAR / 26 AU / 52). Displays early Stanley Gibbons catalog annotations lightly in pencil. 4. ZANZIBAR – 1957 Sultan’s 78th Birthday Definitive Short Set: Official printed purple dhow cachet cover bearing 10 denominations, canceled with exceptionally crisp, clean circular date stamps (ZANZIBAR / 26 AU / 57). 5. ZAMBIA – 1968 New Decimal Currency High-Value Set: Prone to heavy catalog premiums, this clean, unaddressed cover carries 10 decimal currency definitive stamps, critically including the high-value K1 and K2 denominations. 6. MOZAMBIQUE – 1975 Post-Independence Unaddressed Cover: Issued shortly after independence from Portugal (21/12/1975), this pristine unaddressed collector piece features 8 stamps, including the scarce top-tier 10.00 and 50.00 high-face-value denominations. 7. ZAMBIA – 1964 Independence 1st Definitive Short Set: Historic official First Day Cover issued on national independence day (24th October 1964) featuring the national coat of arms cachet and 11 definitive stamps. Condition & Preservation Report: The overall condition of this lot is very high. Most covers remain bright, flat, and crisp. Expect minor, standard age-related toning/foxing consistent with 50-to-70-year-old tropical paper stocks on a few edges. No stamps are damaged, and all circular date stamps (C.D.S.) remain fully legible. Please carefully inspect the comprehensive front and back high-resolution images provided to verify the individual condition of each item before bidding. All items are sent by UPS courier with full tracking.