Spiral staircase - good for small spaces. Metal frame with wooden treads. Has been used outside so has some rust on metal frame and blackening of the wood but still structurally in good condition so with a lick of paint it would look great indoors too.
From centre of middle post to the outside of spiral it’s 600mm and it goes up a full storey (from bottom of centre post to top treat is 2400mm) There are 12 steps and the railings are at a height of 950mm from the top of the treads.