All I could find with a quick search is that the KO is
produced near Leningrad in KO = Krasnġi Oktjabr factory.
So the engine at least is Russian, and the rest is likely to be too. ?
It seems there was a Latvian Moped Factory "Sarkana Zvaigzne"
which may make it a SZ-50 moped with KO 49cc engine.
There were apparently a series of those engines, from the 1950s,, with rotary valve inlet,
and lately the Chinese have been doing newer more bicycle type versions - but without the rotary inlet.
Not knowing values in Sth Africa, its likely to be worth what someone will pay.
Which is stating the obvious, but unless it is running well, its value is not going to be huge,
mopeds have a following though and its certainly unusual.
Cheers.
