Blue Fluted Plain Large and very rare soup tureen from around 1850

Royal Copenhagen Blue Fluted Plain, large and very rare oblong soup tureen for 18 persons. The factory mark shows, that this was made around 1850. Both lid and bowl was decorated by the same painter (number 4). Factory first. Length 35.0 cm. There is an insignificant and born with small firing cracj at the side, please see close-up picture. Otherwise perfect condition with no chips, cracks or repairs.