DEVICA design, Vianagres, or Gres de Viana, Portugal

I just picked this up at a garage sale.  I believe it's stoneware, maybe a salt glaze.   There are three marks on the bottom, one of which says, I believe, "MADE IN PORTUGAL".   The other two I can't decipher.  I'm curious if anyone recognizes them.   Thanks.  

One of the rare times an image search was helpful--it says Devica.

Thank you so much. It looks like the company, Vianagres, is still in business and that the piece was from the 1980s. I think DEVICA was the design line for Vianagres, or Gres de Viana. I learned that "gres" is Portuguese for "stoneware" and that Viana is a region north of Porto, on the western coast of Portugal.