When I was a kid a Russian friend I had gave me these set of Soviet stamps, issued at the end of the Space Race years. I must say they have a glossy appearance that was not captured by the scanner (and I did not bothered trying to troubleshoot that), but I suppose they still look quite remarkable.
a point of no return 
So Lovely , I love stamps ….
Yeah I like these ones a lot!
I have some of those. They’re beautiful. My favourite one is the last on your third photograph – the USSR and USA collaboration in space. Year 1975 – not long after that stupid and frightening Cold War.
Oh I had no idea one of them was about the USSR and USA collaboration! Amazing, that is interesting.