And proudly mounted there is a Furphy Tank end.
A convex cast iron disc about 1.2m in diameter and massing about 40kg+/- with a spigot fitting.
As I understand it Furphy cast 2 ends or caps then shipped them to the client.
The client then rolled sheet metal around the ends to make a tank.
The little legs were for mounting on a stand or jinker - a bullock drawn carriage.
Why my Dad has one on his shed is beyond me. That's just the kind of Krazy Kat he is.
So there you go. It's not a Furphy, yet it is.