The rad. was bought as a working part some 20 years ago. It was never been fitted ot tested so condition unknown. There is no thermostat fitting. Good chrome to the mesh.
From car #3 (4325) when restored by Peter Giddings in 1971 , wooden strengthening fillets, pressed, and bolted into the front dumb irons (I have the original one which has a delightful French 3 inscribed upon it - perhaps by Bugatti himself?”