I went down a rabbithole and was looking for the earliest full-disc photos of Earth. Most of the sites I found used exclusively US images ("the Blue Marble" etc), no Soviet representation. Not sure if that's because there truly are no early full-disc images from the Russia or not? The earliest one I could find is from Zond-5, 1968: http://mentallandscape.com/CS_Zond05_1.jpg

Anyone know if there is an earlier image?

edit: found this page but it doesn't have the actual image from 1966 (Molniya 1-3) https://en.wikipedia.org/wiki/Timeline_of_first_images_of_Ea...

edit: I think I found it https://i.stack.imgur.com/LOqc7.jpg From this Quora post https://space.stackexchange.com/questions/32422/was-the-eart...