Not what I would recognise as surface textured Monart, although I can see why one might think it could be - the texture on the surface is similar to the mossy texture of some enamels
inside the vessel walls.
And the base is completely wrong.
If it
is Monart, it's a real scarcity for several reasons (including being of only one colour) and probably worth a lot more than £75.
I reckon I'd take the £75, Keith.
