I'm sure I saw it in my old Russian Record Company/Collets catalogue lists,back in the days of Melodiya Lps. (How I used to relish perusing those,often,bulky mailing lists!)
The materials from which the boxes themselves were made - particularly the glue, I think? - lent a peculiarly slavic odour to these sets :) The old record department at Collets was somewhat notable in this respect :)
I wish Melodiya would realise the value they hold in their enormous back catalogue? Even if they released them just as downloads, they'd be hugely valuable.
There is a peculiar guy in Kiev (whom I know personally) who operates under the name of Sir Walter Boot-Legge. His apartment is stacked from floor to ceiling with what used to be the back catalogue at Melodiya's branch in Kiev. I believe he has a lot of it 'available'. He speaks English :)