Czecholsovak 7.62x54R aluminum cases?

Has anybody knowledge about a possible Czechoslovak production of 7.62x54R aluminum cases?

EOD, I saw only turned dummy with rubber primer. This is not old sample. I don´t know nothing about CS production of 7,62x54R with aluminium cases.
However some experiments in the past are possible, but not confirmed yet.

THV, yes, it would be one of the very few standard calibers in this world where no aluminum cases did exist. Somehow hard to imagine with the background of it being the oldest service caliber in the world. (I know we may argue about 7.92x57 in Serbian use now but that is only one single tiny country)