The Royal Copenhagen Blue Fluted Half Lace Butter Pat 504 from 1961 is a vintage porcelain dish with a unique Blue Fluted pattern in blue and white. Handmade in Denmark, this circular small dish features a glaze finish and is part of the Blue Fluted product line by Royal Copenhagen. The underglaze production technique and Musselmalet theme make it a valuable addition to any dinnerware collection, showcasing the craftsmanship and style of Danish pottery production in the 1960s.