Genuine Bugatti water pump numbered and from a 1926 Brescia believe they all were used on Grand Prix cars plus new Bugatti bolts and nuts remaining from rebuild along with period switches from the 20's as per photograph offers for all parts or happy to split if required.
Broken down. Not working. Could bake a working engine from the 2. Found in grandfathers / uncles garage along with large amount of other de Dion parts..