The original reddit thread has three other versions of the 1977 picture at the start of this set, modified to be desktop backgrounds. Here are all of them. The clear winner, in my opinion, is that last one.
Via Reddit: “Today my dad told me that in 1977 while stationed in Germany, he sat down with a fellow soldier who was drawing something with a few pens and shared a beer with him. Right before my dad walked away, he handed my dad this.”
reminds me of bakshi