Basically strasserite analogue in 30's. Quoting not bad description at wiki:

The party's goal was "the victory of labor over greedy capitalism." In internal policy, the PNS demanded "undivided power in the state for the Polish working class", which was to be ensured by land reform, nationalization of large industry and parliamentary democracy. In relation to the Slavic national minorities, she postulated tolerance, while the Jewish problem she wanted to solve through Jewish emigration. In foreign policy, she postulated the creation of a bloc of Slavic states. On a global scale, it was postulated to establish a universal union of national socialist republics where cultural and economic cooperation was to take place in harmony while maintaining national and political autonomy.

It was also very marginal party, basically meaningless. Though i recently see that symbol here and there in the internet, someone has been digging deep. I guess it's another stop on the trot to nazi pipeline happening on the far margins of polish politics.

First thing I hear of them. But it does look like thr Nazi strassrite faction inspired them.

Most probably nazbols, so scum either way.

Neither can I. I don’t think this is an official party. There was a nationalist party, now defunct, that’s just the sword. And this may be an offshoot of that symbolism.