Blue Fluted Plain Extra large soup tureen from around 1850-1880

Royal Copenhagen Blue Fluted, extra large soup tureen. The factory mark tells, that this was produced around 1850 to 1880. Factory first Length 37.0 cm., height 26.0 cm. There is one small dark spot in the glaze on the lid, please see pictures, and a dark spot in the glaze on the inside of the bowl. Otherwise perfect condition with no chips, cracks or repairs.