Joint Issue with Russia

On the site of Rusmarka is mentioned for October 4th, 2018 a joint issue with Greece :

Joint Issue of the Russian Federation and the Hellenic Republic.
Year of Tourism.
Dmitrov Kremlin

2 stamps, sheet with illustrated margins of 8-15 stamps and a coupon

This issue was foreseen for September 6th but postponed till October 4th.

Would anyone have more info about this joint issue?

Which leads me to another question : does anyone know if the philatelic issue plan of Greece is available online?

Thanks in advance for any information.

1937-1938 joint issue between Greece, Roumania, Turkey and Jougoslavia to commemorate the Balkan Entente*

* not from my collection