Thank you Francois for shading some light on this string-manufacturer.
The strings are chrome-steel and its windings are flatwound. Chrome is quite a common material to use for musical instrument strings and flatwound is absolutely and most definitely the most common type of winding for the bass violin.
"Never change a winning team" my luthier told me. As with the toilet, flatwound windings are continuously being manufactured, sold and used for a reason. There is no need to reinvent the wheel.
A little anecdote: I played acoustic solo bass on the street. Someone came up to me and mentioned how the whole street was filled with acoustic bass sound. Filled with curiosity the person asked me two questions: what strings were installed and if there was a chance to play the bass. My reply was "no clue" and "here is the bass".
I conclude: it is most definitely in the fingers...
But, I digress, in the end I paid a bit more than half of the selling price of other solo tuning strings.