Galvanised Water Tank/back Boiler For Boat/van Restoration

This is an unusual galvanised water tank which I have just taken out of our 1960's Bluebird static caravan.This tank is designed to have the stove flue to pass through it to make you hat water. It is in amazing condition for its age. It is 41cm tall 41cm wide and 31cm deep. The flue tube, which passes up the centre of the tank is 8cm diameter.There is a pipe connection at the bottom and a cut lid, like a tea pot lid on the top for filling, I suppose.