In 2011, PR China issued Maximum Card MC-95 (2-1), captioned “Abridged Armilla,” with Chinese stamp and Chinese postmark.  It also issued companion card MC-95 (2-2), captioned “Equatorial Armillary Sphere,” with Denmark stamp and Danish postmark.  We have two of each card (see them as codes 39600020 and 39600021), everything Grade: 1.   Just one card will be $6, but if you buy one of China and one of Denmark (as a set), the set will be $9.