Dutch gunboat no. 6 docked in 1868 at the navy yard at Hellevoetsluis, Netherlands

The Dutch gunboat no. 6 was between 17 and 28 July 1868 docked in the fore dry dock at the navy yard at Hellevoetsluis, Netherlands.

Source
Archive Marine-Etablissement Hellevoetsluis 1738-1913(Nationaal Archief, The Hague) inventory number 507.