The design is unlikely to have been Smrčková.
Smrčková's active design career covered more than sixty years, and she was arguably to non-pressed glass, what Schrötter is to pressed glass history, a monumental figure in the Czechoslovakian glass industry of the period.
Her graduation piece was executed by Moser 1922-23, and in the next sixty-odd years she is known to have designed for at least sixteen major factories, and for some of those factories for extended periods. Examples would be Ruckl and Moser.
For un-recorded items from the period 1923-1983+, Ludvika Smrčková would be one of the first designers that should be considered as a possible. 440 items were shown in the 1983 retrospective, and that is but a fraction of her known designs.
Regards,
Marcus