Fish table mat by Arne Lindaas, for Porsgrund Norway 1960s

Rare ceramic plate/trivet underside of arne lindaas for porsgrund norway. The fish model was published until the 70s - several sets, in blue or sometimes gray, with this wonderful décor. This piece is dated 1960 - the stamp on the back gives the date of edition. Arne lindaas 1924 -2011. Porcelain biscuit very dense and shiny, matte below. In very good condition - tiny scratches. Length 21cm width 13cm.