I would say the 'first image' from 5xadrezmemoria7's post is the 1950 original, the second is perhaps the early 1970's repro'?
I thought the first image was of the set used at the Spassky/Fisher rematch in the early nineties? The second image was taken from Izmet's site, where he presented it as a supposedly authentic but incomplete original 1950 set.
Here's a pic of Gligoric Playing in Dubrovnik, 1950:
I would say the 'first image' from 5xadrezmemoria7's post is the 1950 original, the second is perhaps the early 1970's repro'?