I purchase this at an auction to donate to the Museum of RAF Fire Fighting (at the moment homeless) were I volunteer. I am an ex RAF Firefighter and well aware of the history of Fire Floats, Fire Boats and inshore rescue.
I suspect that this is from a kit with plans, but incomplete as it has no water monitors and other features. I am no model maker but there are people at the museum that could complete this.
Any advice/information would be appreciated. Cheers, "Firefox"