Special Delivery Combination Postal History. A most unusual group of 60+ worldwide combination covers with USA special delivery stamps affixed in country of origin, as well as local postage; displayed in one large volume, mainly 1960s period, with colorful frankings from a wide range of countries, including Ceylon, Chile, Dominica, Egypt, France, Great Britain, Honduras, Iran, Mexico, Nigeria, Switzerland and many others; mostly all different; some toning present as these covers were all mailed over the years to Puerto Rico; this material would be extremely difficult to replace, ideal for the eBayer. Estimate  $300 - 400. $0