Don Birschel (USA) made a major discovery with this Cuba – North Korea twin issue [T1] released on August 29, 2020!!! It took more than two and a half years to learn about the existence of these two identical souvenir sheets related to the 60th anniversary of the relationship between the two countries and illustrated through a handshake between the two presidents of the countries, Kim Jong Un and Miguel Mario Diaz-Canel Bermudez. 20,000 samples of the North Korean souvenir sheet have been printed. Obviously, we have to increase our capabilities in accessing to information related to such countries. However, this newly discovered joint issue must be considered as a really nice twin issue that will be updated soon in the Volume 14 of the catalogue.