Mystery Black Terracotta Vase

What an odd few days with auctions - I got hardly anything that I was planning on getting as the prices went too high, (e.g. the Dybdahl dish $120, the Soholm bonkers Bird $190) ...but I did manage to pick up a few small pieces of Fajance at reasonable prices, which I will show during the week... and then one or two interesting pieces like the one in this post.

This beautiful vase is hand thrown and blackened terracotta. It appears as if the piece has been carved lightly when "green" and black coloured slip has been applied (light brush marks visible) ,and then probably after firing the first time a black gloss glaze applied to just the carved areas, and re fired to finish...or something along those lines..quite a few possibilities with this technique.

It was in a Danish shipment, but the signature on the bottom looks to be Czech or Polish? - so I am hoping some of my many Eastern European readers might recognise it. It is blacker than it appears in the photos - but so hard to photograph.

Its a lovely size at about 27cm tall, and obviously made by a professional with a high level of skill, working quickly. It reminds me of the Hjorth blackened  “Jugendstyle"” from 1900 which was made from a similar blackened terracotta - but this piece is probably mid-century looking at the style of the flowers.

I'm curious if anyone has seen this type of piece before?