Hi Michal, unikat is slightly variable, but can mean five or less, almost always less than 10, but this can be changed afterwards. I think that the Art Czechoslvoakia pieces in the Svoboda era catalogues are approximately fifty or so. For specific patterns it is still possble to ask Mr Svoboda in his factory, he does remember a lot. I would presume, that for most Skrdlovice, unikat means less than 10. Unikat is the rarest designation and should really be appreciated for great rarity. I would guess less than 10 for this Svoboda plate.